Location History:
- Chatelaine, FL (US) (1992)
- Delray Beach, FL (US) (1981 - 2000)
Company Filing History:
14 out of 164,219 
1 out of 832,880 Years Active: 1981-2000
Title: The Innovative Contributions of Douglas R Chisholm
Introduction
Douglas R Chisholm is a notable inventor based in Delray Beach, FL (US). He holds a total of 15 patents that showcase his expertise in the field of technology and information handling systems. His innovative designs have significantly contributed to advancements in various technological applications.
Latest Patents
Among his latest patents is the "Acyclic cable bus having redundant path access." This novel PHY concentrator design provides switchable dual paths to disk drives from dual controllers. The concentrator utilizes a common input that is shifted into an internal shift register during the bus reset state. It employs an individual TpBias source for each TPA port connection, rather than a common one for all ports. Additionally, an external shift register can be loaded with an odd/even pattern or a half-on/half-off pattern, which controls the individual TpBias source for each TPA port. This design prevents closed loop conditions when a pair of concentrators are used to build an array of devices, such as a RAID structure.
Another significant patent is the "Information handling system for transfer of command blocks to a local." This system facilitates the transfer of command blocks between a host processing side and a local processing side. The command blocks are transferred by storing the host address of the command block in a local side register set. Upon storing the host address, a transfer signal is given to a command block transfer controller to initiate the transfer without the local processor unit's intervention.
Career Highlights
Douglas has had a distinguished career, working with prominent companies such as International Business Machines Corporation (IBM). His contributions to the field have been recognized and have paved the way for further innovations in technology.
Collaborations
Throughout his career, Douglas has collaborated with notable individuals, including Andrew Boyce McNeill, Jr and Richard Allen Kelley. These collaborations have enriched his work and contributed to the development of innovative solutions in the industry.
Conclusion
Douglas R Chisholm's contributions to technology through his patents and collaborations highlight his role as a significant inventor. His innovative designs continue to influence advancements in information handling systems and beyond.