Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5736013 | Method for forming an improved magnetic media including sputtering of selected oxides or nitrides in the magnetic layer, and apparatus for same | Rajiv Yadav Ranjan, Miaogen Lu, Tu Chen | 1998-04-07 |
| 5695387 | CSS magnetic recording head slider and method of making same | Mark D. Moravec, Tu Chen, Tracy L. Scott, Kyou H. Lee, Tam Huu Nguyen | 1997-12-09 |
| 5673156 | Hard disk drive system having virtual contact recording | Tu Chen, Kyou H. Lee, Yasuo Sakane | 1997-09-30 |
| 5658659 | Magnetic alloy and method for manufacturing same | Tu Chen, Rajiv Yadav Ranjan, Miaogen Lu, Keith Kadokura, John Ko-Jen Chen +1 more | 1997-08-19 |
| 5631094 | Magnetic alloy for improved corrosion resistance and magnetic performance | Rajiv Yadav Ranjan, Tu Chen, John Ko-Jen Chen | 1997-05-20 |
| 5507930 | Method of sputtering a carbon protective film on a magnetic disk by superimposing an AC voltage on a DC bias voltage | Kyou H. Lee, Rajiv Yadav Ranjan, Yuri Trachuk | 1996-04-16 |
| 5482573 | Magnetic material | Shinya Sakurada, Takahiro Hirai, Akihiko Tsutai, Masashi Sahashi, Hideo Nagai | 1996-01-09 |
| 5397644 | Magnetic disk having a sputtered hydrogen-doped carbon protective film | — | 1995-03-14 |
| 5180640 | Magnetic recording medium comprising a magnetic alloy layer of cobalt nickel, platinum and chromium formed directly on a nickel alloy amorphous underlayer | Phuong Nguyen, Tu Chen | 1993-01-19 |
| 5153044 | Magnetic disk for longitudinal recording comprising an amorphous intermediate layer | Tu Chen | 1992-10-06 |
| 5045165 | Method for sputtering a hydrogen-doped carbon protective film on a magnetic disk | — | 1991-09-03 |
| 5032926 | Video tape recorder having picture-in-picture function | Toshiaki Imai, Hiroshi Kuwabara | 1991-07-16 |
| 4988578 | Method for manufacturing a thin film magnetic recording medium | Ching-Cheng Shir, Tu Chen | 1991-01-29 |
| 4985117 | Method of manufacturing josephson junctions | Hideyuki Kurosawa, Toshio Hirai, Hisanori Yamane | 1991-01-15 |
| 4929500 | Corrosion resistant magnetic disk | Ching-Cheng Shir, Tu Chen | 1990-05-29 |
| 4898774 | Corrosion and wear resistant magnetic disk | Ching-Cheng Shir, Tu Chen, Ga-Lane Chen | 1990-02-06 |
| 4830821 | Process of making a contact forming material for a vacuum valve | Tsutomu Okutomi, Seishi Chiba, Mikio Okawa, Tadaaki Sekiguchi, Hiroshi Endo | 1989-05-16 |
| 4786564 | Method for manufacturing a magnetic disk having reduced bit shift, minimized noise, increased resolution and uniform magnetic characteristics, and the resulting disk | Tu Chen | 1988-11-22 |
| 4777335 | Contact forming material for a vacuum valve | Tsutomu Okutomi, Seishi Chiba, Mikio Okawa, Tadaaki Sekiguchi, Hiroshi Endo | 1988-10-11 |
| 4762695 | Methods for preparing high-purity molybdenum or tungsten powder and high-purity oxides powder of the same | Hiroshi Endo, Shigeo Iiri, Masaru Hayashi, Satoshi Yamaguchi, Motoo Seimiya | 1988-08-09 |
| 4749459 | Method for manufacturing a thin film magnetic recording medium | Ching-Cheng Shir, Tu Chen | 1988-06-07 |
| 4414487 | Superconducting electron beam generator | Jinichi Matsuda | 1983-11-08 |
| 4315215 | Plural frequency type superconducting quantum interference fluxmeter | Yutaka Onodera | 1982-02-09 |