Amtel Communications, Inc.
9Patents
0Active
9Granted
27Portfolio score
Filing activity: May 30, 1980 → Jun 7, 1985
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4355207A | Telephone answering system | Electricity | 88 | Expired |
| US4672660A | Method and system for identifying telephone callers | Electricity | 67 | Expired |
| US4727357A | Compact keyboard system | Physics | 22 | Expired |
| US4629831A | Series connected interceptor | Electricity | 18 | Expired |
| US4634811A | Call screening system | Electricity | 10 | Expired |
| US4401856A | Control system for handling direct inward dialed telephone calls | Electricity | 10 | Expired |
| US4503290A | Automatic line supervisor for use with a call concentrator | Electricity | 4 | Expired |
| US4701950A | Telephone answering system with line detector | Electricity | 4 | Expired |
| US4527011A | Call concentrator with automatic line supervisor | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.