Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8471473 | Arc tube for discharge lamp device | Takeshi Fukuyo, Akira Homma, Michio Takagaki | 2013-06-25 |
| 7977886 | Mercury-free discharge bulb | Toshiaki Tsuda, Takeshi Fukuyo, Yukihiro Onoda | 2011-07-12 |
| 7583028 | Mercury free arc tube for a discharge lamp | Michio Takagaki, Takeshi Fukuyo | 2009-09-01 |
| 7443100 | ARC tube discharge lamp with compression strain layer | Takeshi Fukuyo, Michio Takagaki, Akira Homma | 2008-10-28 |
| 7345426 | Alloy for a lead member of an electric lamp and electrode structure of the electric lamp | Yoshihiro Wada, Masahiro Katoh, Takeshi Fukuyo | 2008-03-18 |
| 7314298 | Automotive headlight discharge bulb | Michio Takagaki, Takeshi Fukuyo, Akira Homma | 2008-01-01 |
| 7279841 | Arc tube for a discharge lamp | Takeshi Fukuyo, Michio Takagaki | 2007-10-09 |
| 7170230 | Mercury-free arc tube for a discharge lamp | Michio Takagaki, Takeshi Fukuyo | 2007-01-30 |
| 7038385 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki | 2006-05-02 |
| 6974360 | Method of producing an arc tube for a discharge lamp device | Kunio Fukai, Hiroshi Goto, Yoshihiro Mochizuki, Yukihiro Yoshida, Takeshi Fukuyo | 2005-12-13 |
| 6918808 | Arc tube for discharge lamp and method for producing the same | Takeshi Fukuyo, Yoshitaka Oshima | 2005-07-19 |
| 6903510 | Arc tube having compressive stress and method for manufacture of an arc tube | Yoshitaka Ohshima, Akihiro Nagata, Hiroshi Goto | 2005-06-07 |
| 6891332 | Arc tube capable of preventing occurrence of leak due to cracks and manufacturing method therefore | Yoshitaka Ohshima | 2005-05-10 |
| 6815894 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki | 2004-11-09 |
| 6750612 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki, Masaya Shido, Takeshi Fukuyo | 2004-06-15 |
| 6707239 | Arc tube including step-down plane portions in pinch seal area | Akihiro Nagata, Hiroshi Goto, Yoshitaka Ohshima | 2004-03-16 |
| 6672923 | Method of manufacturing arc tube | Nobuo Ohkawai, Yoshitaka Ohshima, Akihiro Nagata | 2004-01-06 |
| 6580200 | Discharge lamp and manufacturing method thereof | Takeshi Fukuyo, Yoshitaka Ohshima | 2003-06-17 |
| 6547619 | ARC tube for discharge lamp unit and method of manufacturing same | Nobuo Ohkawai, Yoshitaka Ohshima, Masakazu Nagasawa | 2003-04-15 |
| 6456008 | Metal Halide lamp having improved shunting characteristics | Takeshi Fukuyo, Yoshitaka Ohshima | 2002-09-24 |
| 6452334 | Arc tube with residual-compressive-stress layer for discharge lamp unit and method of manufacturing same | Yoshitaka Ohshima, Nobuo Ohkawai | 2002-09-17 |
| 6411037 | Arc tube for discharge lamp device and method of manufacturing the same | Nobuo Ohkawai, Yoshitaka Ohshima, Takeshi Fukuyo | 2002-06-25 |
| 6354900 | Arc tube and fabricating method thereof | Yoshitaka Ohshima, Takeshi Fukuyo, Nobuo Ohkawai | 2002-03-12 |
| 6294861 | Electric discharge lamp apparatus | Kunimasa Mochiduki, Masato Harazaki, Yasuyoshi Numajiri, Takeshi Fukuyo, Yoshitaka Ohshima | 2001-09-25 |
| 6274973 | Electric discharge lamp apparatus with insulating plug | Kunimasa Mochiduki, Masato Harazaki, Yasuyoshi Numajiri, Takeshi Fukuyo, Yoshitaka Ohshima | 2001-08-14 |