Microsoft Corporation et al. vs. Lemko Corporation

Explore the PTAB proceeding IPR2025-01142 filed by Microsoft Corporation et al. on 2025-06-20. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01142

Filing Date

2025-06-20

Accorded Filing Date

2025-06-20

Institution Decision Date

2025-11-20

Last Modified Date

2026-05-06

Proceeding Type

IPR

Termination Date

2025-11-20

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Microsoft Corporation et al.

Represented By

Border, Scottet al

Patent Owner / Respondent

Lemko Corporation

Represented By

Hannah, Jameset 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 12942642

Respondent Patent Number 8310990

External Links

Espacenet

Google Patents

Respondent Inventor Shaowei Pan

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

Address and Attorney/Agent Information

1 Registered Practitioner

Power of Attorney & Correspondence

Firm / Entity Name Lemko Corporation c/o Cygan Law Offices, P.C.

Customer Number 171308

Address 1901 N. Roselle Road, Suite 800, Schaumburg, IL, 60195, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
50937	Joseph Cygan	847-973-5246

Proceeding Documents

Notice: refund approved NOTICE

2026-05-06 FILING PARTY: BOARD

Download

Petitioner’s Request For Refund Of Post-Institution Fees OTHER

2025-12-15 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2025-11-20 FILING PARTY: BOARD

Download

Institution Decision: Deny DECISION

2025-11-06 FILING PARTY: BOARD

Download

2028

Ex. 2028 Exhibit

2025-10-08 FILING PARTY: PATENT OWNER

Download

Microsoft Corporation et al. vs. Lemko Corporation

Proceeding Overview

Parties & Counsel

Petitioner

Microsoft Corporation et al.

Represented By

Patent Owner / Respondent

Lemko Corporation

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 Fees OTHER

Director Discretionary Decision: Deny RESPONSE

Institution Decision: Deny DECISION

Ex. 2028 Exhibit

Ex. 2027 Exhibit

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

Ex. 2029 Exhibit

Ex. 2030 Exhibit

Patent Owner's Preliminary Response POPR

Ex. 2009 Exhibit

Ex. 2018 Exhibit

Ex. 2011 Exhibit

Ex. 2015 Exhibit

Ex. 2008 Exhibit

Ex. 2005 Exhibit

Ex. 2017 Exhibit

Patent Owner's Request for Discretionary Denial RESPONSE

Ex. 2020 Exhibit

Ex. 2007 Exhibit

Ex. 2003 Exhibit

Ex. 2004 Exhibit

Ex. 2022 Exhibit

Ex. 2012 Exhibit

Ex. 2025 Exhibit

Ex. 2002 Exhibit

Ex. 2010 Exhibit

Ex. 2021 Exhibit

Ex. 2001 Exhibit

Ex. 2013 Exhibit

Ex. 2016 Exhibit

Ex. 2024 Exhibit

Ex. 2014 Exhibit

Ex. 2006 Exhibit

Ex. 2023 Exhibit

Ex. 2019 Exhibit

Ex. 2026 Exhibit

Patent Owner's Mandatory Notices Under 37 C.F.R. 42.8(a)(2) NOTICE

Notice: Notice filing date accorded NOTICE

Patent Owner's Power of Attorney NOTICE

IPR Petition (990) PETITION

Ex1006 - 3GPP TS 23.002 v7.1.0 -- March 2006 Exhibit

Ex1001 - US8310990 Exhibit

Ex1003 -Declaration of James Proctor (990 Petition) Exhibit

Ex1002 - US8310990_FH Exhibit

Ex1010 - 2025-04-30 [17] Lemko Reply Brief Exhibit

Ex1007 - IPR2023-00531 Final Written Decision Exhibit

Ex1005 - US Patent App Pub No 20070021120 (Flore) Exhibit

Ex1009 - 2025-01-29 [13] Lemko Opening Brief Exhibit

Petitioner AT&T's Power of Attorney NOTICE

Petitioner Microsoft's Power of Attorney NOTICE

Ex1012 - 2023-02-13 Hsieh-Yee Declaration Exhibit

Ex1004 - James Proctor CV Exhibit

Ex1008 - IPR2023-00531 2023-12-21 [15] Patent Owner's Response Exhibit