Nippon Telegraph
7Patents
1Active
7Granted
33Portfolio score
Filing activity: Oct 20, 1988 → Aug 8, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5603631A | Mechanism for preventing detachment of a plug | Physics | 64 | Expired |
| US5434579A | Inverted F antenna with non-contact feeding | Electricity | 29 | Expired |
| US4962526A | Image data transmission apparatus | Electricity | 24 | Expired |
| US6021246A | Closure for cable connection | Physics | 13 | Expired |
| US4999955A | Method and apparatus for conically machining optical fiber connectors | Performing Operations; Transporting | 6 | Expired |
| US7657435B2 | Acoustic signal transmission method and apparatus with insertion signal | Electricity | 3 | Active |
| US5021877A | Optical image reading apparatus capable of reading multi-colored original | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.