Microsoft Corporation vs. Sandpiper CDN, LLC

Explore the PTAB proceeding IPR2026-00190 filed by Microsoft Corporation on 2025-12-29. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2026-00190

Filing Date

2025-12-29

Accorded Filing Date

2025-12-29

Institution Decision Date

2026-05-15

Last Modified Date

2026-06-16

Proceeding Type

IPR

Termination Date

2026-05-15

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Microsoft Corporation

Represented By

Kaiser, Jessicaet al

Patent Owner / Respondent

Sandpiper CDN, LLC

Represented By

Eisenberg, Jasonet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2400 - Computer Networks, Multiplex & Cybersecurity

Patent Information

1 Patent Involved

Respondent Application Number 13714410

Respondent Patent Number 9456053

External Links

Espacenet

Google Patents

Respondent Inventor Christopher Newton et al

Respondent Tech Center TC 2400 - Computer Networks, Multiplex & Cybersecurity

Address and Attorney/Agent Information

145 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C.

Customer Number 26111

Address 1101 K Street, NW, 10th Floor, WASHINGTON, DC, 20005, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
28912	Robert Sterne	202-772-8555
29021	Jorge Goldstein	202-371-2600
32831	Tracy-Gene Durkin	202-371-2600
33876	Donald Featherstone	202-772-8629
33997	Michael Ray	202-772-8569
34368	Randy Lacasse	202-772-8678
34395	Robert Millonig	202-371-2600
35239	Michael Lee	703-628-0233
36013	Robert Sokohl	202-371-2600
36351	Karen Markowicz	202-772-8637
36688	Eric Steffe	202-371-8625
38759	John Covert	202-371-2600
39967	Eldora Ellison	202-772-8508
41306	Timothy Shea Jr	202-371-2600
42289	Donald Banowit	202-371-2600
43447	Jason Eisenberg	202-371-2600
44757	Jeffrey Helvey	202-772-8675
45871	Mark Rygiel	202-371-2600
45986	Peter Jackman	202-371-2600
47756	Gaby Longsworth	202-371-2600
48256	Pamela Mingo	202-371-2600
51802	James Hietala	202-772-8795
53812	Daniel Yonan	202-371-2600
54179	Michelle Holoubek	202-772-8855
54463	Michael Specht	202-371-2600
55440	Jennifer Chagnon	202-772-8890
56374	Ross Hicks	202-371-2600
57772	Lori Brandes	202-371-2600
57913	Paul Calvo	202-772-8846
58164	Kristina Kelly	202-776-5284
58403	Marsha Gillentine	202-772-8692
58770	Harish Ruchandani	--
58885	Matthew Bodenstein	202-772-8787
59244	Stephanie Elmer	202-371-2600
59425	Kyle Conklin	202-371-2600
60167	Scott Schaller	202-371-2600
60390	Richard Coller Iii	202-772-8764
60789	Cynthia Derenzo	+358-10-505-6847
60889	Salvador Bezos	202-772-8533
61205	David Holman	202-371-2600
61327	Jonathan Tuminaro	202-371-2600
61868	Dennies Varughese	202-772-8805
62732	Deborah Sterling	202-772-8501
63208	Christopher O'Brien	202-772-8680
63285	Joseph Mutschelknaus	202-371-2600
63504	Ralph Powers Iii	202-772-8876
63929	Jaume Canaves	202-371-2600
64228	Graham Phero	202-772-8860
64515	Daniel Gajewski	202-772-8774
64587	Syed Ahmed	847-289-5228
64974	Michael Gross Iii	202-772-8762
65021	Christian Camarce	202-772-8895
65172	Byron Pickard	202-371-2600
65211	Michael Malek	410-533-1922
65245	Richard Crudo	202-772-8575
65261	Evan Linderman	202-772-8915
65326	Olga Partington	202-772-8626
65367	Jason Fitzsimmons	202-772-8701
65457	Lauren Schleh	703-836-6400
65458	Robert Schmidt	202-772-8716
66568	Branka Bogunovic	202-772-8727
66638	Jeremiah Frueauf	202-772-8506
67254	Ryan Richardson	202-772-8729
67836	Bonnie Nannenga-Combs	202-371-2600
68395	Daniel Block	202-371-2600
68504	Ji Eun Kim	202-371-2600
68658	Richard Bemben	202-371-2600
68887	Amirali Sharifi	202-772-8871
69086	Daniel Bernard	202-371-2600
69105	Nirav Desai	202-371-2600
69199	Tyler Tassone	202-371-2600
69235	Karen Wong-Chan	202-772-8647
69836	Darrin Hopper	202-772-8630
70077	Shoshana Marvin	202-772-8850
70291	Christopher Gallo	202-371-2600
70307	Joshua Mccoy	202-772-8869
70524	Dohm Chankong	202-772-8529
70680	Sarah Leesman	202-371-2600
71185	Rebekah Holtz	202-772-8712
72039	Daniel Choo	202-371-2600
72126	Tyler Liu	202-772-8641
72314	Lestin Kenton Jr.	202-772-8594
72488	Yuke Wang	214-284-3876
72567	Todd Hopfinger	202-772-8696
72762	Bryan Hsu	202-772-8912
72780	Jessica Harrison	202-772-8901
72981	Trevor O'Neill	202-371-2600
73112	David Haars	202-371-2600
73287	Charles Hammond	202-772-8551
73707	Matthew Smith	202-772-8503
73784	Mark Arrington	202-772-8528
73904	Steven Pappas	202-772-8719
74017	Robert Niemeier	309-678-6806
74290	Ian Soule	202-772-8984
74533	Alexander Covington	202-772-8749
74612	Ivy Clarice Estoesta	202-772-8686
74992	John Higgins	202-783-6040
75034	Tyler Drye	202-772-8614
75069	Tyler Dutton	202-772-8982
75187	Timothy Tang	202-772-8758
75234	Rola Aylo	202-772-8810
75269	Roozbeh Gorgin	202-772-8667
75349	Brian Burke	202-772-8861
75455	Tiaotiao Anchondo	202-772-8804
76231	Todd Thurheimer	202-772-8863
76838	Joseph Venier	202-772-8785
76928	Hasina Ali	202-772-8978
76989	Lisa Ritchey	202-371-2600
77163	Randy Montgomery	202-371-2600
77546	Brian Dudley	216-647-1931
77776	Zhichun Zhang	202-772-8813
78359	Kelsey Pitts	202-772-1271
78365	Wenhao Xiong	202-772-8615
78508	Louis Panzica Jr.	202-772-8954
78921	Maria Briscione	202-772-8517
79290	Michael Webb	202-772-8834
79587	Kristofer Schroder	859-991-6529
79831	Christian Berrios	317-345-2233
79850	Paige Cloud	202-371-2600
79858	Matthew Metzger	202-772-8702
800005	Yangbeini Wang	202-772-883
80057	Ethan Goldschen	202-772-1296
80168	Benjamin Nagasing	202-772-8981
80713	Pengke Li	202-772-8602
80729	Masayuki Iino	202-772-8605
80938	Michael Nathanson	202-777-9644
81041	Xiaowei Jin	202-772-8752
81053	Carson Smith	202-772-1272
81060	Michael Guzzano	202-772-8646
81186	Adil Moghal	202-371-2600
81318	Pratibha Khanduri	202-772-8509
81485	Madeleine Bond	202-772-1299
81654	Payton Miles	202-772-1276
81975	Justin Wang	626-388-6351
82104	Maxwell Furigay	202-772-1281
82162	Reuben Moses	202-772-8664
82208	Sara Keeble	202-772-8560
82263	Hailey Mendenhall	202-772-8933
82382	Xinxiang Zhang	202-772-8621
82448	Kaci Kratch	512-517-8691
82703	Thomas Baraldi	202-772-1279
82896	Deepa Shiwcharan	202-772-1284
83022	Jean Selep	202-772-1270
83036	Nicholas Holdreith	202-772-8888
83174	Marc-Anthony Armand	202-772-1283

Proceeding Documents

102

Notice: refund approved NOTICE

2026-06-03 FILING PARTY: BOARD

Download

Petitioner's Request for Refund OTHER

2026-06-01 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2026-05-15 FILING PARTY: BOARD

Download

Director Discretionary Decision: Deny RESPONSE

2026-04-28 FILING PARTY: BOARD

Download

Petitioner's Authorized Sur-Reply to Patent Owner's Reply in Support of Its Request for Discretionary Denial OTHER

2026-04-20 FILING PARTY: PETITIONER

Download

Microsoft Corporation vs. Sandpiper CDN, LLC

Proceeding Overview

Parties & Counsel

Petitioner

Microsoft Corporation

Represented By

Patent Owner / Respondent

Sandpiper CDN, LLC

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 OTHER

Director Discretionary Decision: Deny RESPONSE

Director Discretionary Decision: Deny RESPONSE

Petitioner's Authorized Sur-Reply to Patent Owner's Reply in Support of Its Request for Discretionary Denial OTHER

Patent Owner's Discretionary Denial Reply Brief OTHER

Email Correspondence Exhibit

EX2017 - TechCrunch - Level 3 Lands Netflix Streaming Exhibit

EX2016 - LATimes - Sandpiper Puts Its Footprint in Marketplace Exhibit

EX2013 - EOY June 2000 Exhibit

EX2024 - Wayne NOC 2011 Exhibit

EX2027 - Christie Network Operations Center Exhibit

EX2007 - Declaration of Samuel Russ Exhibit

Patent Owner's Updated Mandatory Notices NOTICE

EX2020 - What is a CDN Exhibit

Patent Owner's Preliminary Response POPR

EX2026 - ESA NOC 2011 Exhibit

EX2023 - Microsoft Computer Dictionary (5th Ed.) Exhibit

EX2025 - ATT NOC 2011 Exhibit

EX2012 - PRNewsWire - Sandpiper Named Best of the Best Exhibit

EX2015 - NYT - Web-page Distribution System Could Unclog Internet Traffic Jams Exhibit

EX2022 - Azure Front Door Exhibit

EX2018 - PRNewsWire - CenturyLink Exhibit

EX2008 - Russ CV Exhibit

EX2021 - Azure Content Delivery Network Exhibit

EX2011 - UCSD-Connect-Newsletter Exhibit

EX2019 - CDN Stands for Content Delivery Network Exhibit

EX2014 - WSJ - Sandpiper Networks' Footprint Takes Exhibit

EX1045 - Sandpiper CDN, LLC v. Comcast Cable Commc’ns LLC, No. 2:24-cv- 00886, Dkt. 1 (E.D. Tex.) Exhibit

EX1052 - Google LLC v. Sandpiper CDN, LLC, IPR2025-00806, Paper 14 (Nov. 10, 2025) (Institution Decision) Exhibit

EX1056 - Docket Navigator, Sandpiper CDN, Cases Search Exhibit

EX1057 - Sandpiper CDN, LLC v. Microsoft Corp., No. 2:25-cv-00664, Dkt. 43 (E.D. Tex.) Exhibit

EX1060 - Federal Court Management Statistics for the 12-Month Period Ending 12-31-2025 Exhibit

EX1039 - Bibliographic Data Sheet for U.S. App. No. 19/030,497 Exhibit

EX1051 - Google LLC v. Sandpiper CDN, LLC, IPR2025-00826, Paper 15 (Nov. 7, 2025) (Institution Decision) Exhibit

EX1036 - Patent Assignment Cover Sheet from Level 3 Communications, LLC to Sandpiper CDN, LLC, Reel No. 068256, Frames 0091-115 Exhibit

EX1061 - Sandpiper CDN, LLC, Division of Corporations - Filing Exhibit

EX1059 - Sandpiper CDN, LLC v. Microsoft Corp., No. 2:25-cv-00664, Dkt. 32 (E.D. Tex.) Exhibit

EX1041 - Sandpiper CDN, LLC v. Google LLC, No. 2:24-cv-03951, Dkt. 1 (C.D. Cal.) Exhibit

EX1038 - Exemplary Search Results from https://ppubs.uspto.gov/pubwebapp/ Exhibit

EX1055 - Google LLC v. Sandpiper CDN, LLC, IPR2025-01010, Paper 17 (Dec. 1, 2025) (Institution Decision) Exhibit

EX1048 - Sandpiper CDN, LLC v. Microsoft Corp., No. 2:25-cv-00664, Dkt. 41 (E.D. Tex.) Exhibit

EX1049 - Google LLC v. Sandpiper CDN, LLC, IPR2025-00806, -00826, Paper 13 (Sep. 12, 2025) (referring petitions) Exhibit

EX1043 - Sandpiper CDN, LLC v. Google LLC, No. 2:24-cv-03951, Dkt. 45-1 (C.D. Cal.) Exhibit

EX1044 - Sandpiper CDN, LLC v. Google LLC, No. 2:24-cv-03951, Dkt. 93 (C.D. Cal.) Exhibit

EX1037 - Order, Sandpiper CDN, LLC v. Comcast Cable Commc’ns, LLC, No. 2:24- cv-00886 (E.D. Tex. Apr. 2, 2026), ECF No. 132 Exhibit

EX1046 - Sandpiper CDN, LLC v. Comcast Cable Commc’ns LLC, No. 2:24-cv- 00886, Dkt. 62 (E.D. Tex.) Exhibit

Petitioner's Opposition to Patent Owner's Request for Discretionary Denial RESPONSE

EX1042 - Sandpiper CDN, LLC v. Google LLC, No. 2:24-cv-03951, Dkt. 28 (C.D. Cal.) Exhibit

EX1047 - Sandpiper CDN, LLC v. Microsoft Corp., No. 2:25-cv-00664, Dkt. 1 (E.D. Tex.) Exhibit

EX1040 - U.S. Publication 2025/0310417 Exhibit

Google LLC v. Sandpiper CDN, LLC, IPR2025-00860, -00969, -01010, Paper 14 (Oct. 10, 2025) (referring petitions) Exhibit

EX1054 - Google LLC v. Sandpiper CDN, LLC, IPR2025-00969, Paper 14 (Nov. 28, 2025) (Institution Decision) Exhibit

EX1058 - Sandpiper CDN, LLC v. Microsoft Corp., No. 2:25-cv-00664, Dkt. 57 (E.D. Tex.) Exhibit

EX1053 - Google LLC v. Sandpiper CDN, LLC, IPR2025-00860, Paper 15 (Nov. 25, 2025) (Institution Decision) Exhibit

EX2005 - Complaint EDTX-2-25-cv-00664-1 Exhibit

EX2004 - Gilstrap Motion to Stay Exhibit

EX2003 - Interim Memo Exhibit

EX2002 - Exhibit C101 Inelligibility Contentions Exhibit

EX2001 - First Amended Docket Control Order 2_25-cv-00664-32 Exhibit

Patent Owner's Discretionary Denial Brief RESPONSE

EX2006 - MSFT Invalidity Cont Cover Pleading Exhibit

EX1035 - Stipulation letter, dated February 4, 2026 Exhibit

Petitioner's Updated Exhibit List NOTICE

Notice: Notice filing date accorded NOTICE