Zeiss Ikon AG
12Patents
0Active
12Granted
28Portfolio score
Filing activity: Oct 1, 1974 → Apr 18, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4608842A | Lock and key system | Emerging Cross-Sectional Technologies | 77 | Expired |
| US4876535A | Method and apparatus for non-contacting information transmission | Electricity | 42 | Expired |
| US4807454A | Means for locking a displaceable or rotatable part | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4593185A | Safety lock | Physics | 12 | Expired |
| US4653298A | Lock-key system | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4662197A | Magnetic lock | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4603566A | Safety lock | Emerging Cross-Sectional Technologies | 6 | Expired |
| USD294005S | Key or similar article | General | 5 | Expired |
| US4481796A | Mortise lock provided with bolt and latch | Emerging Cross-Sectional Technologies | 4 | Expired |
| US3960337A | Offset drive pin adaptors for film projectors, film spools, and 35mm to 16mm converters | Physics | 4 | Expired |
| US4805428A | Lock and key | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4641508A | Lock with bolt enlargement | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.