Intertel, Inc.
Andover, MA, US· latest recorded location
Intertel, Inc. is named on 6 US grants and 0 published applications in this corpus. Its most frequent classification is H04L (Digital communication).
- Granted patents
- 6
- Published applications
- 0
- Inventors
- 6
- Granted in 2026 so far
- 0
- Most recent grant
- 15 Dec 1981
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
By publication year.
Technology areas
Share of 6 documents
Recent patents
- Communications unit for voice and data15 Dec 1981US 4,306,116 A
- Automatic switching unit for data communications network28 Feb 1978US 4,076,961 A
- Line level signal measuring device25 Oct 1977US 4,055,733 A
- Data communications network testing system25 Oct 1977US 4,055,808 A
- Modulator and demodulator for data communications network19 Jul 1977US 4,037,049 A
No published applications.
Most cited
By later US patents
- Synchronizing circuit for modems in a data communications network48US 3,955,141 A1976
- Communications unit for voice and data46US 4,306,116 A1981
- Automatic switching unit for data communications network31US 4,076,961 A1978
- Data communications network testing system28US 4,055,808 A1977
- Line level signal measuring device13US 4,055,733 A1977