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Trademarks = 3

Forward Citations = 163

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8 inventors (with patents filed for the assignee):

Daniel Granville Bills (10 out of 20 patents)

Paul C Arnold (4 out of 14 patents)

Michael Dale Borenstein (4 out of 19 patents)

4. Wilbert Leonard Porter (1 out of 2 patents)

5. Charles F Morrison (1 out of 28 patents)

6. Stephen L Dodgen (1 out of 1 patent)

7. Craig B Van Cleve (1 out of 1 patent)

8. Charles F Morrison Jr (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 6025723 - Miniature ionization gauge utilizing multiple ion collectors (2000-02-15),

2. 5902932 - Force balancing capacitance manometer (1999-05-11),

3. 5801535 - Ionization gauge and method of using and calibrating same (1998-09-01),

4. 5452613 - Wide range vacuum gauge (1995-09-26),

5. 5422573 - Ionization gauge and method of using and calibrating same (1995-06-06),

6. 5296817 - Ionization gauge and method of using and calibrating same (1994-03-22),

7. 5250906 - Ionization gauge and method of using and calibrating same (1993-10-05),

8. 5128617 - Ionization vacuum gauge with emission of electrons in parallel paths (1992-07-07),

9. 4866640 - Temperature compensation for pressure gauge (1989-09-12),

10. 4714891 - Method and apparatus for improving the safety and extending the range of (1987-12-22),

11. 4636680 - Vacuum gauge (1987-01-13),

12. 4307323 - Vacuum gauge (1981-12-22),

Granville-Phillips Company is a leading manufacturer of vacuum gauges and transducers for the semiconductor, research, and industrial markets. With a history dating back to 1955, they provide high-quality, reliable products that meet the demanding requirements of vacuum technology. Their portfolio includes ionization, cold cathode, and thermal conductivity gauges, as well as pressure transducers and controllers. Granville-Phillips Company is known for its innovative solutions and excellent customer service.

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USPTO Data Jan 1 1976 - Dec 9 2025

12 Patents

#94 in Boulder, CO

#509 in Colorado

#24,779 in US

#46,665 in the World

Boulder, CO, United States of America

Granville-phillips Company