Summa Four, Inc.
🏢 View company profile →3Patents
0Active
3Granted
30Portfolio score
Filing activity: Oct 18, 1978 → Sep 19, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4232199A | Special services add-on for dial pulse activated telephone switching office | Emerging Cross-Sectional Technologies | 179 | Expired |
| US5594727A | Telephone switch providing dynamic allocation of time division multiplex resources | Electricity | 85 | Expired |
| US5426634A | Flexible call-processing apparatus for | Electricity | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.