James E. Opfer
9Patents
8h-index
9Co-inventors
58Inventor score
Filing activity: Oct 2, 1974 → Oct 15, 1987
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4663009A | System and method for depositing plural thin film layers on a substrate | Electricity | 49 | Expired |
| US4610911A | Thin film magnetic recording media | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4790921A | Planetary substrate carrier method and apparatus | Emerging Cross-Sectional Technologies | 34 | Expired |
| US3980076A | Method for measuring externally of the human body magnetic susceptibility changes | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4079730A | Apparatus for measuring externally of the human body magnetic susceptibility changes | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4626336A | Target for sputter depositing thin films | Electricity | 28 | Expired |
| US4834855A | Method for sputter depositing thin films | Electricity | 22 | Expired |
| US4631202A | Thin film magnetic recording film | Physics | 18 | Expired |
| US4221834A | Superconductive magnetic shield and method of making same | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.