Cipher Data Products, Inc.
20Patents
0Active
20Granted
29Portfolio score
Filing activity: Aug 31, 1978 → Sep 12, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4573091A | Cartridge tape drive | Physics | 37 | Expired |
| US4672613A | System for transferring digital data between a host device and a recording medium | Physics | 34 | Expired |
| US4459628A | Disk cartridge | Physics | 32 | Expired |
| US5025334A | Auto-loading transport for tape cartridge with tape access door and belt capstan roller | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4541019A | Recording system for recording data on tape in a disk-recording format | Physics | 24 | Expired |
| US4704645A | Transport for tape cartridge with leader block | Physics | 23 | Expired |
| US4677508A | Endwise loaded cartridge tape drive | Physics | 22 | Expired |
| US4243186A | Low profile magnetic tape drive with vacuum actuated auto-threading | Physics | 18 | Expired |
| US4500965A | Capstanless magnetic tape drive with electronic equivalent to length of tape | Physics | 13 | Expired |
| US4785363A | Cartridge alignment mechanism for tape drive | Physics | 11 | Expired |
| US4609958A | Precision bearing for reciprocating a magnetic head | Physics | 10 | Expired |
| US4852825A | Extraction and insertion mechanism for a leader block of a tape cartridge | Physics | 9 | Expired |
| US4809099A | Transport for tape cartridge with leader block | Physics | 6 | Expired |
| US4933636A | Self-aligning tachometer and method of manufacturing same | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4949914A | Tape transport with rigid arm threader mechanism for leader block tape cartridge | Physics | 3 | Expired |
| US4184180A | File protect and amount of tape sensing apparatus | Physics | 3 | Expired |
| US4183068A | Magnetic tape transport mechanism | Physics | 2 | Expired |
| US4206890A | Tape position sensing apparatus for magnetic tape drive | Physics | 2 | Expired |
| US4236682A | Slot loaded, low profile magnetic tape drive | Physics | 2 | Expired |
| USRE31250E | Slot loaded, low profile magnetic tape drive | General | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.