Certance LLC
31Patents
7Active
31Granted
38Portfolio score
Filing activity: Jul 19, 2001 → Apr 28, 2008 · 7 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7222289B2 | Channel processor using reduced complexity LDPC decoder | Electricity | 17 | Expired |
| US6943979B2 | Method and apparatus for written-in tracking error composition for linear tape drives | Physics | 16 | Expired |
| US7274528B2 | System and method for protecting head elements of a tape drive | Physics | 10 | Expired |
| US7227724B2 | Head actuator assembly for a tape drive | Physics | 10 | Expired |
| US7382561B1 | Measuring and correcting asymmetry in magnetic recording devices | Physics | 7 | Expired |
| US7133262B1 | Tape drive apparatus with a head alignment system | Physics | 7 | Expired |
| US7038874B1 | Tamper resistant write once recording of a data storage cartridge having rewritable media | Physics | 6 | Expired |
| US7379259B2 | Head actuator design for a low profile tape drive | Physics | 4 | Expired |
| US7134624B2 | Locking dual hub tape reel for tape drives | Physics | 3 | Expired |
| US7230788B2 | System and method for tape drive control | Physics | 3 | Expired |
| US7502196B2 | Head actuator design for a low profile tape drive | Physics | 3 | Active |
| US7518831B2 | Low impedance flexible circuit for tape head | Electricity | 3 | Active |
| US7420781B2 | Head actuator assembly for a tape drive | Physics | 2 | Active |
| US7145272B2 | Motor/encoder assembly for tape drives | Electricity | 2 | Expired |
| US7729070B2 | Method and apparatus for interpolating peak detection of servo stripe pulses | Electricity | 2 | Active |
| US7536701B2 | Lockable ejection system and method | Physics | 2 | Active |
| US7126786B1 | Motor/encoder assembly for tape drives | Electricity | 1 | Expired |
| US7097125B2 | Tape drive with automatic adaptation for different size tape cassettes | Physics | 1 | Expired |
| US7342745B2 | Cartridge carrier | Physics | 1 | Expired |
| US7440235B2 | Tape drive apparatus with a head alignment system | Physics | 1 | Active |
| US7066420B2 | Tape drive apparatus having an arrangement for capturing and retaining a leader pin from a tape cartridge | Physics | 1 | Expired |
| US7292410B2 | Tape drive head cleaner | Physics | 1 | Expired |
| US7203027B2 | System and method for measuring the position of a tape drive head | Physics | 1 | Expired |
| US7154695B2 | System and method for controlling the speed of a tape drive | Physics | 0 | Expired |
| US7180708B1 | Stationary tape guide with spring arrangement and ceramic guide portion mating with plastic mounting portion | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.