Company Filing History:
Years Active: 1998-1999
Title: The Innovations of John E Ahern
Introduction
John E Ahern is a notable inventor based in Sudbury, MA (US), recognized for his contributions to the field of computer systems. He holds a total of three patents, showcasing his innovative approach to technology and problem-solving.
Latest Patents
One of Ahern's latest patents is the Transparent Fault Tolerant Computer System. This invention involves a primary replica supervisor that is interposed between an operating system and a primary replica of an application program executed by a primary processor. An object-code editor is utilized to locate calls to the operating system and loops within the application program. It inserts instruction sequences that allow the replica supervisor to intercept calls to the operating system, results returned by the operating system, and asynchronous events delivered by the operating system to the replica. A backup replica supervisor is similarly positioned between the operating system and a backup replica of the application program executed by a backup processor. The primary replica interacts with its environment, while the replica supervisors ensure that the backup replica undergoes state transformations equivalent to those of the primary replica. This design allows the backup replica to interact with the environment consistently, even after a failure in the primary processor.
Career Highlights
Ahern has made significant strides in his career, particularly through his work at Stratus Computer, Inc. His innovative contributions have played a crucial role in advancing fault-tolerant computing systems.
Collaborations
Throughout his career, Ahern has collaborated with esteemed colleagues such as Thomas C Bressoud and Kenneth P Birman. These partnerships have further enriched his work and innovations in the field.
Conclusion
John E Ahern's work exemplifies the spirit of innovation in technology, particularly in developing fault-tolerant systems. His contributions continue to influence the field and inspire future advancements.
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