Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9475675 | Elevator and elevator refurbishing method | Takao Nishida | 2016-10-25 |
| 9114956 | Elevator modification work apparatus | Hiroshi Narasada, Seiji Okuda | 2015-08-25 |
| 9090435 | Elevator hoisting machine and elevator hoisting machine manufacturing method | Hiroshi Narasada, Seiji Okuda | 2015-07-28 |
| 8763763 | Elevator apparatus having car position detection | — | 2014-07-01 |
| 7500652 | Hoist for elevator | Takayuki Shimizu, Shun-Ichirou Saitou | 2009-03-10 |
| 5171906 | Process for treating by-product oil | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1992-12-15 |
| 5134761 | Electrical insulating oil composition and capacitors prepared therewith | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1992-08-04 |
| 5113029 | Electric insulating oil composition | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1992-05-12 |
| 5107395 | Method of producing insulating oil comprising dibenzylbenzene | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1992-04-21 |
| 5081758 | Electrical insulating oil composition and capacitors prepared therewith | Atsushi Sato, Keiji Endo | 1992-01-21 |
| 5081757 | Electrical insulating oil composition and capacitors prepared therewith | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1992-01-21 |
| 5017733 | Electrical insulating oil composition | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1991-05-21 |
| 5015793 | Electrical insulating oil composition | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1991-05-14 |
| 4994539 | Method for improving impulse destructive stength of electrical insulating materials | Yuichi Orikasa, Shinji Kojima, Takashi Inoue, Kaoru Yamamoto, Atsushi Sato | 1991-02-19 |
| 4982025 | Electrical insulating oil comprising improved fraction | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1991-01-01 |
| 4967028 | Electrical insulating oil composition and electrical appliances impregnated therewith | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1990-10-30 |
| 4902841 | Method for producing electrical insulating oil composition | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1990-02-20 |
| 4899009 | Method for producing m-benzyltolune | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1990-02-06 |
| 4870221 | Oil-filled capacitor | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1989-09-26 |
| 4804729 | Electrical insulating material and power cable comprising a crosslinked layer thereof | Yuichi Orikasa, Shinji Kojima, Takashi Inoue, Atsushi Sato, Kaoru Yamamoto | 1989-02-14 |
| 4803238 | Polymer composition | Atsushi Sato, Keiji Endo, Eiichi Matsuzaka, Satoshi Narui | 1989-02-07 |
| 4802058 | Novel method for refining electrical insulating oil | Keiji Endo, Hideyuki Dohi, Atsushi Sato | 1989-01-31 |
| 4761508 | 1,1-(3-ethylphenyl)phenylethylene and method for preparing it | Isoo Shimizu, Yasuo Matsumura, Atsushi Sato | 1988-08-02 |
| 4750083 | Electrical insulating oil composition | Atsushi Sato, Keiji Endo, Hideyuki Dohi | 1988-06-07 |
| 4748209 | Method for improving impulse destructive strength of electrical insulating materials | Yuichi Orikasa, Shinji Kojima, Takashi Inoue, Kaoru Yamamoto, Atsushi Sato | 1988-05-31 |