Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8367987 | Flexible PTC heating element and method of manufacturing the heating element | Takahito Ishii, Keiko Yasui, Kazuyuki Kohara, Mitsuru Yoneyama | 2013-02-05 |
| 7675004 | Heating element and production method thereof | Keizo Nakajima, Takahito Ishii, Keiko Yasui, Takehiko Shigeoka, Kazuyuki Kohara +1 more | 2010-03-09 |
| 7049559 | Flexible PTC heating element and method of manufacturing the heating element | Takahito Ishii, Keiko Yasui, Kazuyuki Kohara, Mitsuru Yoneyama | 2006-05-23 |
| 4954696 | Self-regulating heating article having electrodes directly connected to a PTC layer | Kazunori Ishii, Yasutomo Funakoshi, Tadashi Sakairi | 1990-09-04 |
| 4783587 | Self-regulating heating article having electrodes directly connected to a PTC layer | Kazunori Ishii, Yasutomo Funakoshi, Tadashi Sakairi | 1988-11-08 |
| 4775500 | Electrically conductive polymeric composite and method of making said composite | Yasutomo Funakoshi | 1988-10-04 |
| 4661690 | PTC heating wire | Shuji Yamamoto, Yoshio Kishimoto, Hideho Shinoda | 1987-04-28 |
| 4354092 | Electric hair curling iron with rechargeable battery power supply | Keiji Manabe, Tadanori Kawamura, Masao Fukunaga, Takeo Nishida, Toshiaki Nagakoshi | 1982-10-12 |