ZOOM Telephonics, Inc.
16Patents
3Active
16Granted
37Portfolio score
Filing activity: Jan 14, 1981 → Oct 18, 2006 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5361296A | Modem with ring detection/modem processing capability | Emerging Cross-Sectional Technologies | 132 | Expired |
| US6081587A | Modem with ring detection/modem processing capability | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5440619A | Voice, data and facsimile modem with modified ringback answering | Electricity | 26 | Expired |
| US8750290B2 | Method and apparatus for ensuring accessibility to emergency service via VoIP or via PSTN | Electricity | 20 | Active |
| US7593389B2 | Distinctive dial tone for a VoIP call | Electricity | 16 | Active |
| USD271301S | Telephone switch-connector unit | General | 15 | Expired |
| US5528385A | Faxmodem with scanning capability | Electricity | 15 | Expired |
| USD271302S | Telephone switch-connector device | General | 10 | Expired |
| US6963640B1 | Memory architecture for telephone dialer | Electricity | 9 | Expired |
| USD271762S | Telephone switch-connector assembly | General | 8 | Expired |
| US5835578A | Modem with ring detection/modem processing capability | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5898756A | Parallel-connected dialing signal transmission-inhibiting device for data transfer over a telephone link | Electricity | 7 | Expired |
| US8194651B2 | Method and apparatus for user authentication | Electricity | 4 | Active |
| US6944774B2 | Data flow control unit | Physics | 2 | Expired |
| US6711238B1 | Parallel-connected dialing signal transmission inhibiting device for data transfer over a telephone link | Electricity | 0 | Expired |
| US6289087A | Modem with ring detection/modem processing capability | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.