Oki Telecom, Inc.
39Patents
0Active
39Granted
38Portfolio score
Filing activity: Mar 26, 1990 → Jun 17, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6138036A | Wireless telephone with voice data interface mode | Electricity | 159 | Expired |
| US5276729A | Radiotelephone for automatically dialing remotely programmed number upon call termination and without user operation | Electricity | 158 | Expired |
| US5442806A | Preferred carrier selection method for selecting any available cellular carrier frequency when neither home nor preferred cellular carrier frequencies are available | Electricity | 148 | Expired |
| US6236863A | Comprehensive transmitter power control system for radio telephones | Electricity | 130 | Expired |
| US6091948A | One number service using mobile assisted call forwarding facilities | Emerging Cross-Sectional Technologies | 127 | Expired |
| US5537410A | Subsequent frame variable data rate indication method | Electricity | 104 | Expired |
| US6029072A | Portable telephone with terminal mode facility | Electricity | 91 | Expired |
| US6141353A | Subsequent frame variable data rate indication method for various variable data rate systems | Electricity | 81 | Expired |
| US6356538B1 | Partial sleep system for power savings in CDMA wireless telephone devices | Emerging Cross-Sectional Technologies | 79 | Expired |
| US6198947A | External control unit with reduced keypad integrated in voice activated vehicular telephone system with call-in-process voice-to-tones and voice to-memory conversion facilities | Emerging Cross-Sectional Technologies | 75 | Expired |
| US6188888A | Charging unit and wireless telephone having multi-number call forwarding capability | Electricity | 70 | Expired |
| US5732347A | Imminent change warning | Electricity | 68 | Expired |
| US6230031A | Power amplifying circuitry for wireless radio transceivers | Electricity | 67 | Expired |
| US5722068A | Imminent change warning | Electricity | 57 | Expired |
| US5784693A | Cellular carrier selection system incorporating a preferred list of system identification codes (SIDs) corresponding to preferred cellular carriers | Electricity | 54 | Expired |
| US5697081A | Intermodulation distortion reduction circuit utilizing variable attenuation | Electricity | 51 | Expired |
| US5689815A | Saturation prevention system for radio telephone with open and closed loop power control systems | Electricity | 50 | Expired |
| US6018655A | Imminent change warning | Electricity | 48 | Expired |
| US5627835A | Artificial window size interrupt reduction system for CDMA receiver | Electricity | 42 | Expired |
| US5673266A | Subsequent frame variable data rate indication method | Electricity | 38 | Expired |
| US6073035A | System unavailablity power reduction method with early failure and no rotation | Emerging Cross-Sectional Technologies | 35 | Expired |
| USD327247S | Recharger for a battery pack for a mobile phone | General | 35 | Expired |
| US6016427A | Preferred carrier selection method | Electricity | 34 | Expired |
| US6070058A | Saturation prevention system for radio telephone with open and closed loop power control systems | Electricity | 32 | Expired |
| USD346494S | Portable cellular telephone carrying case with expandable, easy-access to battery | General | 31 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.