Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8471473 | Arc tube for discharge lamp device | Akira Homma, Michio Takagaki, Shinichi Irisawa | 2013-06-25 |
| 8174195 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki, Akira Homma | 2012-05-08 |
| 8148902 | Mercury-free arc tube for discharge lamp device and method for manufacturing the same | Michio Takagaki, Akira Homma, Yoshihiro Mochizuki | 2012-04-03 |
| 7977886 | Mercury-free discharge bulb | Toshiaki Tsuda, Shinichi Irisawa, Yukihiro Onoda | 2011-07-12 |
| 7746000 | Discharge bulb | Michio Takagaki, Akira Homma | 2010-06-29 |
| 7671536 | Arc tube for discharge lamp device | Michio Takagaki, Akira Homma | 2010-03-02 |
| 7583028 | Mercury free arc tube for a discharge lamp | Michio Takagaki, Shinichi Irisawa | 2009-09-01 |
| 7489083 | Mercury-free arc tube for discharge bulb | Akira Homma, Michio Takagaki | 2009-02-10 |
| 7443100 | ARC tube discharge lamp with compression strain layer | Michio Takagaki, Akira Homma, Shinichi Irisawa | 2008-10-28 |
| 7438620 | Arc tube of discharge lamp having electrode assemblies receiving vacuum heat treatment and method of manufacturing of arc tube | Akira Homma, Michio Takagaki, Shinya Misonou | 2008-10-21 |
| 7345426 | Alloy for a lead member of an electric lamp and electrode structure of the electric lamp | Yoshihiro Wada, Masahiro Katoh, Shinichi Irisawa | 2008-03-18 |
| 7314298 | Automotive headlight discharge bulb | Michio Takagaki, Akira Homma, Shinichi Irisawa | 2008-01-01 |
| 7279841 | Arc tube for a discharge lamp | Michio Takagaki, Shinichi Irisawa | 2007-10-09 |
| 7170230 | Mercury-free arc tube for a discharge lamp | Michio Takagaki, Shinichi Irisawa | 2007-01-30 |
| 6974360 | Method of producing an arc tube for a discharge lamp device | Kunio Fukai, Hiroshi Goto, Yoshihiro Mochizuki, Yukihiro Yoshida, Shinichi Irisawa | 2005-12-13 |
| 6918808 | Arc tube for discharge lamp and method for producing the same | Yoshitaka Oshima, Shinichi Irisawa | 2005-07-19 |
| 6750612 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki, Masaya Shido, Shinichi Irisawa | 2004-06-15 |
| 6653785 | Arc tube with pinch seal and dimensional relationship and method for forming the same | Michio Takagaki, Masaya Shido, Yukihiro Kobayakawa, Masayuki Umehara, Nobuyuki Kasuya +1 more | 2003-11-25 |
| 6616494 | Method and apparatus for supplying pellets to arc tube for discharge lamp | Akihiro Nagata, Kunio Fukai, Masakazu Nagasawa | 2003-09-09 |
| 6580200 | Discharge lamp and manufacturing method thereof | Shinichi Irisawa, Yoshitaka Ohshima | 2003-06-17 |
| 6456008 | Metal Halide lamp having improved shunting characteristics | Shinichi Irisawa, Yoshitaka Ohshima | 2002-09-24 |
| 6411037 | Arc tube for discharge lamp device and method of manufacturing the same | Nobuo Ohkawai, Yoshitaka Ohshima, Shinichi Irisawa | 2002-06-25 |
| 6354900 | Arc tube and fabricating method thereof | Yoshitaka Ohshima, Nobuo Ohkawai, Shinichi Irisawa | 2002-03-12 |
| 6321799 | Method and apparatus for supplying mercury to arc tube for discharge lamp | Kunio Fukai, Akihiro Nagata, Masakazu Nagasawa | 2001-11-27 |
| 6294861 | Electric discharge lamp apparatus | Kunimasa Mochiduki, Masato Harazaki, Yasuyoshi Numajiri, Yoshitaka Ohshima, Shinichi Irisawa | 2001-09-25 |