TIE Communications, Inc.
🏢 View company profile →60Patents
0Active
60Granted
34Portfolio score
Filing activity: Jul 19, 1974 → Sep 13, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4740955A | Communications system having voice and digital data capability and employing a plurality of voice and data buses in main service unit and serial packetized transmission to and from telephones | Electricity | 77 | Expired |
| US4173714A | Communication circuit with combined power feed and data transmission over a phantom channel | Electricity | 71 | Expired |
| USD293088S | Transmitter | General | 41 | Expired |
| USD267873S | Base for a telephone set | General | 37 | Expired |
| US4577310A | Station interface for digital electronic telephone switching system having centralized digital audio processor | Electricity | 36 | Expired |
| USD296894S | Telephone station set | General | 33 | Expired |
| US4203011A | Computer controlled key telephone station set | Electricity | 30 | Expired |
| USD260643S | Base for a telephone set | General | 28 | Expired |
| USD271394S | Direct station selection console | General | 23 | Expired |
| US4667142A | Three-way power source circuit | Emerging Cross-Sectional Technologies | 22 | Expired |
| USD287852S | Telephone station set | General | 20 | Expired |
| USD282745S | Direct station selection console | General | 18 | Expired |
| USD259212S | Base for a telephone set | General | 18 | Expired |
| USD266086S | Direct station selection console | General | 18 | Expired |
| US4338495A | Electronic key telephone systems | Electricity | 18 | Expired |
| US4140877A | Muliple highway time division multiplexed PABX communication system | Electricity | 17 | Expired |
| USD287491S | Telephone set | General | 16 | Expired |
| USD259933S | Direct station selection console | General | 15 | Expired |
| USD295407S | Telephone set | General | 14 | Expired |
| USD287585S | Telephone set | General | 13 | Expired |
| USD293905S | Telephone base with combinative keyboard, display panel, speakerphone, and handset therefor | General | 13 | Expired |
| USD287246S | Telephone station set | General | 13 | Expired |
| USD282165S | Telephone set | General | 12 | Expired |
| US4757521A | Synchronization method and apparatus for a telephone switching system | Electricity | 12 | Expired |
| US4341927A | Data transmission apparatus | Electricity | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.