Dr. Walker has testified in more than 20 trials, been deposed more than 60 times. Dr. Walker has testified in Federal District Court as well as at the ITC patent validity and infringement of complex software and hardware systems and ICs. Dr. Walker has also testified in a jury trials and arbitrations in matters relating to technology issues including patents and misappropriation of trade secrets. He has significant experience in in crafting expert reports and defending his opinions in deposition testimony. He has also provided expert testimony supporting his opinions related to IPRs.
|
Identification |
Party |
Technology |
|
EDTEX Case No. 5:22-CV-00069 |
Pantech (Plaintiff) |
Android OS source code Window manager operation |
|
MASS Case No.: 19-12551-FDS |
Google (Defendant) |
CPU Processor architecture including RTL source code |
|
DDEL: Case No.: 13-cv-1835 |
2Wire (Defendants) |
DSL modem firmware source code (two trials) |
|
MINN: Case No: 19-704 (PAM/BRT) |
MPAY (Plaintiff) |
Copyright Infringement of client-side source code relating to payroll processing |
|
DDEL: Case No. 13-0009 (RGA) |
Interdigital (Plaintiff) |
LTE Cellular modem hardware and firmware source code |
|
DDEL: Case No. 13-0010 (RGA) |
Interdigital (Plaintiff) |
LTE Cellular modem hardware and firmware source code |
|
NDCAL: Case No. 3:08-cv-05129-JCS |
Volterra (Plaintiff) |
Design of integrated circuits |
|
MASS Case No.: 09-11414-RWZ |
Nuance (Plaintiff) |
Server-side speech recognition system in a mobile environment |
|
Identification |
Party |
Attorneys |
Testimony |
Technology |
|
ITC: Inv No.: 337-TA-1278 |
Zebra (Complainant) |
Morgan Lewis |
Deposition Hearing |
Server and sensor source code for reading RFID tags |
|
ITC: Inv No.: 337-TA-1256 |
Carku (Respondent) |
Perkins Coie |
Deposition Hearing |
Power controller MCU firmware and schematics |
|
ITC: No. 337- |
Interdigital (Complainant) |
Wilson Sonsini |
Depositions Hearings |
Android device source code supporting integration of data connections over WLAN and cellular networks (two hearings) |
|
ITC: Inv No.: 337-TA-859 |
Realtek (Complainant) |
Reed Smith |
|
Integrated circuit design |
|
ITC: Inv No.: 337-TA-698 |
Richtek |
Alston Bird |
|
Integrated circuit design; misappropriation of trade secrets |
|
Identification |
Party |
Attorneys |
Testimony |
Technology |
|
IPR2022-00358 Patent No: 7,881,941 |
Google (Petitioner) |
O’Melveny |
Yes |
Server-side source code related to website processing |
|
IPR2020-00846 Patent No: 7,076,431 |
Google (Petitioner) |
Wolf Greenfield |
Yes |
Server-side source code related to website processing |
|
IPR2016-00144 Patent No: 6,199,076 |
Google (Petitioner) |
White and Case |
Yes |
Networked Audio Player technology and architecture |
|
IPR2014-01145 Patent No: 6,237,127 |
Synopsys (Patent Owner) |
Jones Day |
Yes |
IC design technology |
In addition to the matters listed above, Dr. Walker has provided expert opinions and been deposed on matters in the following subject matters: