Hans Zapfe
2Patents
0Active
2Granted
23Portfolio score
Filing activity: Jun 4, 1984 → Dec 5, 1984
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4601806A | Magnetron cathode for sputtering ferromagnetic targets | Electricity | 15 | Expired |
| US4602847A | Method of producing optical elements having interference layers | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.