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For the Inventor, By the Inventor

Roseville, MN, United States of America

David C Johnson

USPTO Granted Patents = 14

Average Co-Inventor Count = 3.1

ph-index = 8

Forward Citations = 282(Granted Patents)


Company Filing History:

goldMedal14 out of 2,439 
 
Unisys Corporation
 patents

Years Active: 1995-2010

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14 patents (USPTO):Explore Patents
1. 7831807 - System and method for expanding the instruction set of an instruction processor (2010-11-09),
2. 7562263 - System and method for detecting and recovering from errors in a control store of an electronic data processing system (2009-07-14),
3. 6944863 - Queue bank repository and method for sharing limited queue banks in memory (2005-09-13),
4. 6542985 - Event counter (2003-04-01),
5. 6247064 - Enqueue instruction in a system architecture for improved message passing and process synchronization (2001-06-12),
6. 6108761 - Method of and apparatus for saving time performing certain transfer (2000-08-22),
7. 6081881 - Method of and apparatus for speeding up the execution of normal extended (2000-06-27),
8. 6029205 - System architecture for improved message passing and process (2000-02-22),
9. 5867699 - Instruction flow control for an instruction processor (1999-02-02),
10. 5796972 - Method and apparatus for performing microcode paging during instruction (1998-08-18),
11. 5761740 - Method of and apparatus for rapidly loading addressing registers (1998-06-02),
12. 5602998 - Dequeue instruction in a system architecture for improved message (1997-02-11),
13. 5450426 - Continuous error detection using duplicate core memory cells (1995-09-12),
14. 5434871 - Continuous embedded parity checking for error detection in memory (1995-07-18),

Title: Innovator Spotlight: David C. Johnson of Roseville, MN

Introduction: David C. Johnson, an accomplished inventor based in Roseville, MN, has made significant contributions to the field of technology with a remarkable portfolio of 14 patents. His innovations primarily focus on enhancing instruction processors and improving error recovery systems in electronic data processing.

Latest Patents: David's latest patents include groundbreaking inventions such as the "System and method for expanding the instruction set of an instruction processor." This invention enables the modification of an instruction processor's hardware instruction set by utilizing bits of an instruction opcode along with programmable bits. It allows for the generation of a branch address to retrieve microcode instructions, facilitating modified instruction execution without hardware changes. Another notable patent is the "System and method for detecting and recovering from errors in a control store of an electronic data processing system." This innovative method detects and recovers from control store memory errors seamlessly, without needing direct interaction with the system's operating system, thus ensuring efficient error handling.

Career Highlights: David C. Johnson currently works at Unisys Corporation, where he applies his inventive expertise to advance the company's technological capabilities. His work not only reflects his engineering prowess but also his commitment to improving data processing systems.

Collaborations: Throughout his career, David has collaborated with notable coworkers like Charles R. Caldarale and David R. Johnson. These partnerships have undoubtedly contributed to the successful development and implementation of various inventive solutions within the company.

Conclusion: David C. Johnson stands out as a prominent inventor whose work continues to influence the landscape of electronic data processing. With his innovative approach and numerous patents, he exemplifies the spirit of invention, making him a valuable asset to Unisys Corporation and the technology sector at large.

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