Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5121258 | Apparatus for anhysteretic duplication of a flexible magnetic disk | Chao S. Chi, Frederick J. Jeffers | 1992-06-09 |
| 5121285 | Method and apparatus for eliminating residual charge on plastic sheets having an image formed thereon by a photocopier | — | 1992-06-09 |
| 5075801 | Electromagnetic drive circuitry for anhysteretic duplication of a flexible magnetic disk | Chao S. Chi | 1991-12-24 |
| 4992699 | X-ray phosphor imaging screen and method of making same | Frederick J. Jeffers | 1991-02-12 |
| 4899240 | Biasing for a UMR head | — | 1990-02-06 |
| 4893208 | Magnetic erase head with terminator magnets on the ends | — | 1990-01-09 |
| 4875127 | Apparatus and method for precise tape guiding in a magnetic tape transport | — | 1989-10-17 |
| 4868697 | Magnetic head with constant area wear profile | — | 1989-09-19 |
| 4853814 | Magnetic head with constant area wear profile | — | 1989-08-01 |
| 4738021 | Method of making a slant gap thin-film head | — | 1988-04-19 |
| 4714324 | Apparatus utilizing dispersion shear | Frederick J. Jeffers | 1987-12-22 |
| 4701820 | Slant gap thin-film head having first and second wedge-shaped structures | — | 1987-10-20 |
| 4670800 | Edge guided magnetic tape tracking | — | 1987-06-02 |
| 4636893 | Piezoelectric driven mass storage | — | 1987-01-13 |
| 4611249 | Flux sensitive tracking | — | 1986-09-09 |
| 4398345 | Method of making a multitrack magnetic head employing double helix structure | William W. French, James U. Lemke | 1983-08-16 |
| 4398229 | Magnetic head with versatile gap | — | 1983-08-09 |
| 4388662 | Thin film magnetoresistive head | Frederick J. Jeffers | 1983-06-14 |
| 4314298 | Multitrack magnetic head employing double helix structure | William W. French, James U. Lemke | 1982-02-02 |
| 4277806 | Magnetic recording using recording media having temperature dependent coercivity | Frederick J. Jeffers | 1981-07-07 |
| 4256781 | Method of forming electrical components over magnetic images | — | 1981-03-17 |