Location History:
- Audubon, IA (US) (2002)
- Sunnyvale, CA (US) (2005 - 2014)
- Houston, TX (US) (2001 - 2017)
Company Filing History:
5 out of 145 
1 out of 16 
6 out of 833,002 Years Active: 2001-2017
Title: David H Hoffman: Innovator in Fluid Properties Measurement
Introduction
David H Hoffman is a notable inventor based in Sunnyvale, CA. He holds a total of 12 patents that showcase his contributions to the field of fluid properties measurement and temperature control in integrated circuits. His innovative approaches have significantly advanced the technology used in high-temperature and high-pressure testing environments.
Latest Patents
One of Hoffman's latest patents is the "Static gel strength measurement apparatus and method." This invention involves a fluid properties measurement apparatus designed for use with a conventional high-temperature high-pressure test cell. The apparatus includes a load cell assembly and a drive motor that drives a rotating shaft magnetically connected to a vane assembly with multiple vane elements. The motor rotates in response to reactive forces of a fluid sample, while the load cell assembly measures these reactive forces. A stepper motor allows for precise shaft rotation, enabling frequent measurements throughout a complete rotation cycle of the vane assembly. This method generates a system interference profile that identifies stress variations from various system components, allowing for accurate fluid properties measurement.
Another significant patent is the "System and method for reducing temperature variation during burn-in." This invention focuses on reducing temperature variation during burn-in testing of integrated circuits. It involves measuring the power consumed by the integrated circuit under test and the ambient temperature associated with it. By adjusting the body bias voltage of the integrated circuit, the desired junction temperature can be achieved, thereby controlling the temperature of individual integrated circuits during testing.
Career Highlights
David H Hoffman has worked with notable companies, including Transmeta Corporation. His experience in these organizations has contributed to his expertise in developing innovative solutions for complex engineering challenges.
Collaborations
Hoffman has collaborated with talented individuals such as Eric Chen-Li Sheng and John Laurence Niven. These collaborations have likely enriched his work and led to further advancements in his field.
Conclusion
David H Hoffman is a distinguished inventor whose work in fluid properties measurement and temperature control has made a significant impact in the engineering domain. His innovative patents reflect his commitment to advancing technology and improving testing methodologies.