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USPTO Patent Rankings Data through Dec 31, 2025
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James E. Opfer — 7 Patents

HP: 6 patents #3,252 of 7,018Top 50%
DEDevelco: 1 patents #6 of 14Top 45%
Palo Alto, CA: #2,978 of 9,675 inventorsTop 35%
California: #83,669 of 386,348 inventorsTop 25%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
James E. Opfer has been granted 7 US patents. The first was granted in 1980 and the most recent in May 1989. James E. Opfer ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list James E. Opfer in Palo Alto, CA, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4834855 Method for sputter depositing thin films Darrel Bloomquist, Bangalore R. Natarajan 1989-05-30 $15,044,000
4790921 Planetary substrate carrier method and apparatus Darrel Bloomquist, George A. Drennan 1988-12-13 $9,160,000
4663009 System and method for depositing plural thin film layers on a substrate Darrel Bloomquist, George A. Drennan, Robert J. Lawton, Michael B. Jacobson 1987-05-05 $37,605,000
4631202 Thin film magnetic recording film Bangalore R. Natarajan 1986-12-23 $24,851,000
4626336 Target for sputter depositing thin films Darrel Bloomquist, Bangalore R. Natarajan 1986-12-02 $73,385,000
4610911 Thin film magnetic recording media Bangalore R. Natarajan 1986-09-09 $26,411,000
4221834 Superconductive magnetic shield and method of making same John M. Pierce, Lawrence E. Valby 1980-09-09 $7,678,000