Kangxi Communications Technologies (Shanghai) Co., Ltd. vs. Skyworks Solutions, Inc.

Explore the PTAB proceeding IPR2025-00372 filed by Kangxi Communications Technologies (Shanghai) Co., Ltd. on 2025-01-14. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-00372

Filing Date

2025-01-14

Accorded Filing Date

2025-01-14

Institution Decision Date

2025-07-16

Last Modified Date

2026-05-18

Proceeding Type

IPR

Termination Date

2025-07-16

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Kangxi Communications Technologies (Shanghai) Co., Ltd.

Represented By

Baird, Johnet al

Patent Owner / Respondent

Skyworks Solutions, Inc.

Represented By

Lin, Haixiaet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2800 - Semiconductors, Electrical & Optical Systems

Patent Information

1 Patent Involved

Respondent Application Number 15377842

Respondent Patent Number 9917563

External Links

Espacenet

Google Patents

Respondent Inventor Ping Li et al

Respondent Tech Center TC 2800 - Semiconductors, Electrical & Optical Systems

Address and Attorney/Agent Information

207 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Knobbe, Martens, Olson & Bear, LLP

Customer Number 20995

Address 2040 MAIN STREET, FOURTEENTH FLOOR, IRVINE, CA, 92614, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
31291	Joseph Re	949-760-0404
31430	Craig Summers	949-760-0404
32297	Edward Schlatter	949-760-0404
34115	Daniel Altman	949-760-0404
34362	John King	949-760-0404
35556	Stephen Jensen	949-760-0404
36516	Michael Fuller	858-707-4000
37688	Steven Nataupsky	949-760-0404
37924	Raimond Salenieks	858-707-4000
39287	Joseph Mallon	858-707-4000
39901	Neil Bartfeld	858-707-4202
40574	Maria Anderson	206-405-2000
40664	Joseph Jennings	949-760-0404
41371	David Weiss	310-551-3450
41394	Adeel Akhtar	415-954-4114
42610	John Grover	949-760-0404
43622	Mark Gallagher	949-760-0404
43745	Sabing Lee	949-760-0404
43878	Joseph Reisman	858-707-4000
44087	Paul Conover	949-760-0404
44328	Melanie Seelig	206-405-2000
45664	Eric Furman	858-707-4000
46206	Mauricio Uribe	206-405-2000
46547	Matthew Bellinger	949-760-0404
47677	Bruce Itchkawitz	949-760-0404
48877	Curtis Huffmire	949-760-0404
51212	Andrew Douglas	949-760-0404
51240	Linda Liu	949-760-0404
51241	James Herkenhoff	6503282844
51754	Christy Green	949-760-0404
51922	Irfan Lateef	949-721-7672
52082	Perry Oldham	949-721-2961
53018	Gregory Hermanson	858-707-4000
53084	Mark Kachner	310-551-3450
53102	Benjamin Katzenellenbogen	(617) 499-6200
53317	Andrew Merickel	415-954-4114
53428	Yichuan Pan	858-707-4000
53658	Sheila Swaroop	949-760-0404
54198	Russell Jeide	949-760-0404
54511	Josue Villalta	949-760-0404
54618	Karen Lenker	949-760-0404
55030	Cheryl Burgess	949-721-2935
55036	Ted Cannon	949-760-0404
55310	Agnes Juang	949-760-0404
55634	Raymond Smith	949-760-0404
56553	Lauren Keller	949-721-6365
57046	Jarom Kesler	949-760-0404
57505	Michael Christensen	949-760-0404
57571	Maria Stout	858-707-4000
57871	Mark Marsden	858-707-4000
58474	Jared Bunker	949-760-0404
58621	Ryan Melnick	858-707-4000
58855	Andrew Kimmel	949-760-0404
59362	Lincoln Essig	202-640-6400
59406	David Trossen	415-954-4114
59856	Terry Tullis	949-760-0404
60295	Brenden Gingrich	858-707-4000
60934	Christopher Ross	949-760-0404
61224	Carol Pitzel Cruz	206-405-2000
61513	Colin Heideman	206-405-2000
61546	Theodore Papagiannis	949-760-0404
61557	Nicholas Zovko	949-760-0404
61569	Qian Dai	858-707-4000
61595	Susan Natland	949-760-0404
61749	Kimberly Miller	858-707-4000
61805	Jason Jardine	858-707-4000
62027	Aaron Davis	415-954-4114
62280	Ian Gillies	858-707-4000
62676	Philip Nelson	949-760-0404
62933	Christie Matthaei	206-405-2000
63035	Kregg Koch	310-551-3450
63051	Brian Claassen	949-760-0404
63106	Chang Lim	949-760-0404
63160	Nathanael Luman	858-836-9000
63635	Alan Laquer	949-760-0404
63934	Jeffery Hallstrom	949-760-0404
64096	Joshua Stowell	949-760-9562
64420	Jason Swartz	609/734-6888
64970	Morgan Coates	949-760-0404
65026	Devanie Dufour	202-640-6400
65066	Scott Cromar	949-721-2812
65157	Laura Hall	949-721-7686
65290	Sean Ambrosius	949-760-0404
65562	Derek Dailey	858-707-4000
65614	Shannon Lam	949-760-0404
65642	Andrea Cheek	202-640-6400
65994	Marko Zoretic	949-760-0404
66152	Lance Smemoe	949-760-0404
66226	Derek Bayles	949-760-0404
66385	Joan Chan	949-760-0404
66766	Andrew Lloyd	949-760-0404
67249	Kyu Min	415-954-4114
67720	Salima Merani	949-760-0404
67824	Hochan Song	949-760-0404
67884	Jonathan Bachand	202-640-6400
68005	Vikas Bhargava	949-760-0404
68069	Vladislav Teplitskiy	949-721-5308
68287	Paul Stellman	415-954-4114
68306	William Adams	949-760-0404
68316	Jason Champion	949-760-0404
68329	Daniel Gibson	949-760-0404
68430	Vladimir Lozan	949-721-2828
68578	Thomas Cowan	858-707-4000
68587	Viswanathan Lakshmanan	415-954-4114
69133	Stephen Larson	949-760-0404
69282	Heungsoo Choi	858-707-4000
70224	Robert Hilton	858-707-4000
70256	Damien Howard	949-760-0404
70367	Adam Powell	650-752-1100
70451	Mark Rubinshtein	858-707-4000
70611	Karen Marie Cassidy	949-721-5302
70780	Bryan Mcwhorter	206-405-2000
71099	Justin Gillett	949-760-0404
71587	Hans Mayer	949-760-0404
71679	Daniel Kamkar	858-707-4180
71691	Makoto Tsunozaki	415-954-4114
71933	Jordan Gottdank	858-707-4000
72423	Brian Graham	415-814-6161
72722	Peter Law	858-707-4243
73097	Harnik Shukla	949-760-0404
73126	David Schmidt	949-721-6386
74164	Aaron Johnson	949-395-4097
74752	Aryeh Feinstein	202-640-6408
74897	Douglas Wentzel	856-285-4688
74907	Dominic Filice	650-849-3061
75143	Michelle Ziperstein	310-407-3475
75150	Clayton Henson	858-707-4000
75231	Paul Spiel	206-405-2032
75319	Alexander Martinez	949-760-0404
75684	Jessica Achtsam	949-760-0404
75686	Jeremy Anapol	949-721-2806
75717	Jeremy Carney	949-760-0404
75733	Katherine Mcmorrow	310-407-3460
75805	Brian Barnes	949-721-5242
76047	Inzer Ni	212-849-3044
76130	Tyler Cox	415-217-3516
76238	Mitchell Hadley	212-849-3013
76314	David Cohen	949-760-0404
76416	Spencer Carter	949-760-0404
76592	Daniel Hughes	858-707-4000
76821	Charles Choi	718-807-5825
77014	Justin Culbertson	202-640-6400
77396	Paige Radtke	949-760-0404
77474	Alistair Mcintyre	858-707-4102
77499	Samuel Cockriel	949-760-0404
77806	Nathan Reeves	206-405-2000
77839	Zachary Messick	858-707-4000
78415	Rhett Ramsey	949-721-2932
78566	Douglas Crandell	858-707-4253
78620	Brian Flynn	858-707-4187
78677	Kurt Jacobs	949-721-2994
79031	Christopher Lewis	202-640-6433
79046	Xiaoyan Wang	949-760-0404
79108	Lindsay Laddaran	949-721-2893
79142	Paige Cappelli	202-640-6409
79146	Serah Friedman	310-825-1097
79242	Joshua Martineau	212-849-3000
79325	Luke Holbrook	949-721-2929
79474	Yi-Ju Chen	858-707-4000
79477	Ryan Newell	949-760-0404
79610	Jose Martin Del Campo	949-721-5340
79631	Daniel Kiang	949-760-0404
79683	Eric Abada	415-217-3515
79744	Erin Cardinal	202-640-6417
79750	Daniel Mittelstein	949-760-0404
79783	Janet Allendorph	858-707-4000
79806	Charles Sirek	949-760-0404
800049	Po-An Chen	949-721-2835
800099	Jae Jin Lee	212-849-3022
800104	Rory Lootsma	949-760-0404
800106	Baiyu Zhu	215-268-3871
800110	Geetha Durairaj	949-760-0404
80143	Tomohisa Fujiwara	858-707-4210
80189	Michael Salamy	858-225-3683
80326	Ashley Morales	858-707-4022
80584	Zachary Grinovich	949-760-0404
80623	Gregory Munchinsky	858-707-4000
80915	Susan Janicki	946-760-0404
80919	Emmett Litvak	91-124-280-6101
81154	Dylan Kramer	949-721-7679
81223	Phillip Minnick	858-707-4000
81514	Ryan Freedman	516-307-6947
81554	Harper Beasley	858-707-4014
81694	Oren Rosenberg	949-721-2928
81756	Sophia Zahn	914-792-8066
81888	Justin Theam	949-760-0404
81919	Richard Witas	120-264-06415
82102	Jordan Deorio	949-721-2840
82117	Purna Chandrasekhar	908-391-4940
82306	Kathryn Mccarthy	949-760-0404
82380	Arash Pia	949-721-5276
82485	Mason Whisnant	212-849-3060
82505	James Raleigh	121-284-93063
82574	Bailey Arenberg	949-760-0404
82614	Zachary Greenberg	347-266-1025
82708	Jaeyoung Choi	949-721-2810
82852	Jacob Etling	724-757-6817
82890	Ningxi Sun	858-707-4110
82901	Cesar Estrada	949-760-0404
82924	Matthew Whitehead	206-405-2041
83014	Shawn Hickey	206-405-2000
83062	Sashank Krothapally	415-217-8380
83091	Shloka Raghavan	858-707-4000
83096	Kelsey Weinman	949-760-0404
83166	Raymond Lu	969-760-2852
83383	Jamal Perry	212-849-3030
L1081	Stacy Rush	646-575-6066

Proceeding Documents

Notice: refund approved NOTICE

2026-05-18 FILING PARTY: BOARD

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Petitioner's Request for Refund of Post-Institution Fee OTHER

2026-05-08 FILING PARTY: PETITIONER

Download

Order Denying Director Review of Institution Decision REHEARING

2025-10-09 FILING PARTY: BOARD

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Patent Owner's Updated Power Of Attorney NOTICE

2025-10-01 FILING PARTY: PATENT OWNER

Download

ORDER Granting Patent Owner’s Motion for Withdrawal of Counsel 37 C.F.R. § 42.10 ORDER

2025-09-22 FILING PARTY: BOARD

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Kangxi Communications Technologies (Shanghai) Co., Ltd. vs. Skyworks Solutions, Inc.

Proceeding Overview

Parties & Counsel

Petitioner

Kangxi Communications Technologies (Shanghai) Co., Ltd.

Represented By

Patent Owner / Respondent

Skyworks Solutions, Inc.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioner's Request for Refund of Post-Institution Fee OTHER

Order Denying Director Review of Institution Decision REHEARING

Patent Owner's Updated Power Of Attorney NOTICE

ORDER Granting Patent Owner’s Motion for Withdrawal of Counsel 37 C.F.R. § 42.10 ORDER

Patent Owner’s Unopposed Motion for Withdrawal of Counsel Joseph F. Haag MOTION

Authorized Response to Director Review Request OTHER

Petitioner’s Request for Director Review of the Discretionary Denial of Institution Decision REQUEST

Ex. 3100 Counsel email for Authorized Response Exhibit

Patent Owner's Updated Mandatory Notices NOTICE

Director Discretionary Decision: Deny RESPONSE

EX1030 Prosecution History for U.S. Patent No. 9917563 Pt. 2 Exhibit

EX1030 Prosecution History for U.S. Patent No. 9917563 Pt. 1 Exhibit

Petitioner's Opposition to Discretionary Denial Brief RESPONSE

EX1029 U.S. Patent No. 9917563 Exhibit

Ayad et al., 2017 IEEE MTT-S International Microwave Symposium Exhibit

Excerpts of Kaplan, Electrical and Electronics Engineering Dictionary (2004) Exhibit

Excerpts of Thomas et al., The Analysis & Design of Linear Circuits (7th ed. 2012) Exhibit

Infineon BCR400W Datasheet Exhibit

ADI HMC7748 Datasheet Exhibit

Vassilev et al., 2011 IEEE MTT-S International Microwave Workshop Series Exhibit

Patent Owner’s Preliminary Response POPR

Excerpts of Razavi, Design of analog CMOS integrated circuits (2nd ed. 2015) Exhibit

Excerpts of Gray et al., Analysis and Design of Analog Integrated Circuits (5th ed. 2009) Exhibit

Wakita Exhibit

Complaint in 8:24-cv-00974- C.D.C.A Part 3 of 4 Exhibit

Redacted Rebuttal Expert Report of David Wentzloff Exhibit

Order No. 33 in Inv. No. 337-TA-1413 Exhibit

Complaint in 8:24-cv-00974- C.D.C.A Part 2 of 4 Exhibit

Global Dossier – JP2008039735 Exhibit

Amended Appendix B - Invalidity Contentions for U.S. Patent No. 9,9,17,563 Exhibit

Order Granting Defendants’ Unopposed Motion for Automatic Stay Exhibit

Patent Owners Request for Discretionary Denial RESPONSE

Complaint in Inv. No. 337-TA-1413 Exhibit

Redacted Opening Expert Report of David Ricketts Exhibit

Complaint in 8:24-cv-00974- C.D.C.A Part 1 of 4 Exhibit

Complaint in 8:24-cv-00974- C.D.C.A Part 4 of 4 Exhibit

Alon Exhibit

Order No. 20 in Inv. No. 337-TA-1413 Exhibit

Notice: Extending Deadline for Discretion Briefing NOTICE

Notice filing date accorded to petition NOTICE

Notice: Power of Attorney NOTICE

Notice: Mandatory Notice NOTICE

EX-1008 Silicon-Germanium BiCMOS HBT Technology for Wireless Power Exhibit

EX-1003 Declaration of Dr. David Ricketts Exhibit

EX-1010 U.S. Patent Publication No. 2011/0128078 (“Doherty”) Exhibit

EX-1014 Excerpts of Bipolar and MOS Analog Integrated Circuit Design Exhibit

EX-1013 Excerpts of Analysis and Design of Analog Integrated Circuits Exhibit

EX-1019 U.S. Patent 6,831,517 (“Hedberg”) Exhibit

EX-1004 U.S. Patent Publication 2009/0212863 (“Ishimaru”) Exhibit

EX-1028 Commission Investigative Staff’s Markman Brief in ITC Inv. No. 337- Exhibit

EX-1022 Single-Package Integration of RF Blocks for a 5 GHz WLAN Exhibit

EX-1020 Joint Claim Construction Chart in ITC Inv. No. 337-TA-1413 Exhibit

EX-1026 Patent Owner’s Markman Brief in ITC Inv. No. 337-TA-1413 Exhibit

EX-1025 A 2.4-GHz SiGe HBT power amplifier with bias current controlling Exhibit

EX-1017 TriQuint Semiconductor, Application Note TVS Protection and Bias Exhibit

EX-1015 Excerpts of Illingworth, Dictionary of Electronics (3d Ed. 1998) Exhibit

EX-1007 U.S. Patent Publication 2011/0025422 (“Marra”) Exhibit

EX-1002 Prosecution History for U.S. Patent 9,917,563 1 of 2 Exhibit

EX-1006 Excerpts of Current Sources and Voltage References Exhibit

Notice: Power of Attorney NOTICE

EX-1024 Horowitz, Elementary Electricity and Electronics, Component by Comp Exhibit

EX-1018 Certified Translation of Japanese Patent Application Publication JP Exhibit

EX-1002 Prosecution History for U.S. Patent 9,917,563 2 of 2 Exhibit

EX-1005 U.S. Patent Publication 2004/0232982 (“Ichitsubo”) Exhibit