Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7438620 | Arc tube of discharge lamp having electrode assemblies receiving vacuum heat treatment and method of manufacturing of arc tube | Akira Homma, Takeshi Fukuyo, Michio Takagaki | 2008-10-21 |
| 7294035 | Method and apparatus for welding shroud glass tube in arc tube for discharge lamp | Masayasu Hirata, Hiromi Kubota | 2007-11-13 |