This inventor holds 6 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Compaq Computer Corporation, Inc., Digital Equipment Corporation, Stratus Technologies Ireland Ltd.. Active years: 1999-2023.
Company Filing History:
3 out of 2,019 
2 out of 2,297 
1 out of 15 Years Active: 1999-2023
Title: The Innovative Mind of Craig Durand Keefer
Introduction
Craig Durand Keefer is a notable inventor based in Nashua, NH (US). He has made significant contributions to the field of computer architecture, holding a total of 6 patents. His work focuses on enhancing the reliability and efficiency of computer systems, showcasing his expertise in fault tolerance and performance optimization.
Latest Patents
Among his latest patents is the "High reliability fault tolerant computer architecture." This invention discloses a fault-tolerant computer system that includes multiple CPU nodes, each equipped with a processor and memory. The system features at least two I/O domains, with one designated as the active I/O domain for communication functions. In the event of a failure in an active node, the state and memory are seamlessly transferred to a standby CPU node, ensuring continuous operation. Another significant patent is "Performance optimization and system bus duty cycle reduction by I/O bridge partial cache line write." This invention improves bus efficiency in multiprocessor systems by incorporating cache coherency protocols and enhanced invalidation schemes, which minimize bus utilization and improve interrupt performance.
Career Highlights
Throughout his career, Keefer has worked with prominent companies such as Compaq Computer Corporation and Digital Equipment Corporation. His experience in these organizations has allowed him to develop innovative solutions that address complex challenges in computer architecture.
Collaborations
Keefer has collaborated with notable individuals in the industry, including Samuel Hammond Duncan and Paul Michael Guglielmi. These partnerships have contributed to the advancement of technology and the development of groundbreaking inventions.
Conclusion
Craig Durand Keefer's contributions to computer architecture through his patents and career experiences highlight his innovative spirit and dedication to advancing technology. His work continues to influence the field and inspire future inventors.