IV Files Suit against Semiconductor Memory Manufacturer Toshiba

Plaintiffs: Intellectual Ventures I, LLC and Intellectual Ventures II, LLC

Defendants: Toshiba Corporation, Toshiba America Information Systems, Toshiba America and Toshiba America Electronic Components

Case Type: Patent Infringement 

Case Number: 1:13-cv-00453

Date Filed: Mar 20, 2013

Court: Delaware District Court


Patent Number

Current Assignee[*]

Issue Date

Expiry Date[†]


Mar 19, 1996

Sep 30, 2014
Circuits, systems and methods for
improving page accesses and block transfers in a memory system

Nov 11, 1997

Oct 26, 2015
Multiple-bank memory architecture
and systems and methods using the

Oct 22, 1996

Sep 12, 2014
Low pin count - wide memory devices
using non-multiplexed addressing and systems and methods using the same

Feb 04, 1997

Aug 31, 2015
Low pin count - wide memory devices
using non-multiplexed addressing and systems and methods using the same

Dec 23, 1997

May 09, 2014
Single chip controller-memory device
with interbank cell replacement capability and a memory architecture and
methods suitable for implementing the same

Oct 27, 1998

Apr 24, 2016
Memory system with multiplexed
input-output port and systems and methods using the same

May 02, 2000

Sep 04, 2017

Serial flash memory

Aug 17, 1999

Aug 18, 2015
Method for configuring an intelligent low power serial bus

Nov 16, 2010

Mar 24, 2019

On-chip service processor

Sep 09, 2003

Sep 27, 2020
ATA device control via a

Table information sourced from MaxVal’s Assignment Database.

As per complaint:
The complaint says that the defendants infringe the above patents by manufacturing products including 
  • Flash memory products such as NAND flash memory and products incorporating NAND flash memory
  • Products with USB host controllers
  • Microcontroller products such as ARM based controllers with Embedded Trace Macrocell (ETM) and products incorporating such controllers
  • Hard drive products, such as Serial ATA (SATA) hard drives and products incorporating such hard drives.
IV’s Chief Litigation CounselMelissa Finocchio provided the following statement:

“We have been in active licensing negotiations with Toshiba for many months, but are unable to reach mutually
agreeable terms. As a result, we’ve filed a complaint for infringement that puts us on a course to end Toshiba’s unlicensed use of our intellectual property.

Most of the world’s largest memory manufacturers have recognized the value of our memory assets and are licensed
to our portfolio, yet Toshiba refuses to take a license and continues to use our intellectual property in its products. Since business negotiations with Toshiba have not been fruitful, we must take the necessary actions to protect the interests of our inventors, investors and licensees.”

Other cases filed:
Another recent case filed by the plaintiff IV is against Symantec with the case number 1:13-cv-00440 on Mar 18 asserting U.S Patents5,537,533; 6,598,131; and 6,732,359.
If you are interested in knowing more about the case(s) filed, please contact us. To get alerts on cases filed, subscribe to our Litigation Alerts

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[*] MaxVal offers Patent Assignment Alert service where subscribers receive email alerts when assignments relating to target applications, patents or entities of interest are recorded.

[†] Expected expiration date. Patent Term Estimator is a free web-based tool that automatically calculate s patent terms and expiration dates for U.S. utility patents.

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