Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6400667 | Recording/reproduction method and apparatus in which sub data is written/read in periods during which writing/reading of main data is not performed | Yoshimasa Utsumi, Yasuaki Maeda, Tsutomu Harada | 2002-06-04 |