Memorex Corporation
58Patents
0Active
58Granted
37Portfolio score
Filing activity: Nov 25, 1974 → Jul 25, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4277809A | Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4356918A | Disc storage container | Physics | 48 | Expired |
| US4125883A | Apparatus for centering and clamping a flexible magnetic recording disc | Physics | 45 | Expired |
| US4644641A | "Fabrication of ""Delta"" magnetic head-sliders" | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4436593A | Self-aligned pole tips | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4030132A | Dual mode velocity servo control for a linear actuator motor | Physics | 31 | Expired |
| US4285019A | Contoured magnetic recording head/slider assembly | Physics | 31 | Expired |
| US4517616A | Thin film magnetic recording transducer having embedded pole piece design | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4254189A | Disc having substrate, intermediate layer and magnetically sensitive layer wherein intermediate layer has melting point less than annealing temperature of substrate but higher than processing temperature of magnetically sensitive layer | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4110802A | Crash stop for disc drive actuator | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4670806A | Self loading slider for magnetic recording heads | Physics | 25 | Expired |
| US4333229A | Method of manufacturing thin film magnetic head/slider combination | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4377827A | Servo positioning control system for a data storage apparatus | Physics | 21 | Expired |
| US4454014A | Etched article | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4391849A | Metal oxide patterns with planar surface | Physics | 18 | Expired |
| US4612586A | Method for measuring timing asymmetry in a magnetic storage system | Physics | 17 | Expired |
| US4088278A | Reel for magnetic recording tape | Performing Operations; Transporting | 15 | Expired |
| US4451819A | Method and apparatus for decoding binary data | Electricity | 14 | Expired |
| US4084200A | Magnetic disc cartridge | Physics | 14 | Expired |
| US4404238A | Precipitated alumina for use in magnetic recording disc media | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4083509A | Reel for magnetic recording tape | Performing Operations; Transporting | 13 | Expired |
| US4091654A | Magnetic recording member abrasion tester | Physics | 12 | Expired |
| US4003086A | Dynamic loop gain alteration for data retrieval | Physics | 12 | Expired |
| US4107748A | Recording head support assembly | Physics | 11 | Expired |
| US4493778A | Water-based magnetic coating composition | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.