Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4751164 | Method of making carrier for use in electrophotographic developers | Kenkichi Hara, Kazuyoshi Oka, Ulf Engstrom, Svenn E. Larssen | 1988-06-14 |
| 4732835 | Carrier for use in electrophotographic developers | Kenkichi Hara, Kazuyoshi Oka, Ulf Engstrom, Svenn E. Larrssen | 1988-03-22 |
| 4663262 | Carrier for use in electrophotographic developers | Kazuyoshi Oka, Toshihiko Kohno, Ulf Engstrom, Svenn E. Larssen | 1987-05-05 |