Chestel, Inc.
4Patents
0Active
4Granted
27Portfolio score
Filing activity: Jan 21, 1974 → Jun 13, 1977
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3937892A | Electronic time-division-multiplexed PABX telephone system | Electricity | 22 | Expired |
| US4087643A | Time division multiplexed PABX communication switching system | Electricity | 10 | Expired |
| US4016370A | Digital tone decoder | Electricity | 10 | Expired |
| US4086440A | Telephone set with loop current interruption timing control | Electricity | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.