Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6528931 | Electric light bulb with base held by positioning ring having elastic pieces and weld pieces | Masayuki Umehara, Kazumasa Sugiyama | 2003-03-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6528931 | Electric light bulb with base held by positioning ring having elastic pieces and weld pieces | Masayuki Umehara, Kazumasa Sugiyama | 2003-03-04 |