Donald J Hanrahan

Title: The Innovations of Donald J. Hanrahan

Introduction

Donald J. Hanrahan is a notable inventor based in Endwell, NY (US). He has made significant contributions to the field of technology, particularly in multiprocessing systems. With a total of 3 patents to his name, Hanrahan's work has had a lasting impact on the industry.

Latest Patents

One of Hanrahan's latest patents is for a "Multiprocessing system with interprocessor communications facility." This invention connects multiple processors to an interprocessor communications facility, which includes arbitration circuitry, mailbox circuitry, and processor interrupt circuitry. The centralized design of this facility allows for fast and efficient communication between processors without relying on main storage. The arbitration circuitry ensures that only one processor accesses the communications facility at a time, while the mailbox circuitry safely delivers messages to intended recipients. Additionally, the processor interrupt circuitry manages interprocessor interrupts, enhancing the overall communication process.

Another significant patent is the "Programmable quiesce apparatus for retry, recovery and debug." This apparatus suspends processor operation in response to error indications, cycling the processor to a known state before stopping the system clock. This feature enables thorough interrogation of the system to identify the cause of any errors.

Career Highlights

Donald J. Hanrahan is currently employed at International Business Machines Corporation (IBM), where he continues to innovate and develop new technologies. His work at IBM has allowed him to collaborate with some of the brightest minds in the industry.

Collaborations

Throughout his career, Hanrahan has worked alongside talented colleagues such as David James Shippy and Brice J. Feal. These collaborations have contributed to the advancement of technology and the successful development of various projects.

Conclusion

Donald J. Hanrahan's contributions to the field of technology through his patents and work at IBM highlight his innovative spirit and dedication to advancing the industry. His inventions continue to influence the way processors communicate and operate efficiently.