Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9599224 | Shell of pressure-resistant container, pressure-resistant container, and exploratory apparatus | Tadahiro Hyakudome, Masao Yoshida | 2017-03-21 |
| 9403584 | Pressure-resistant container and exploration machine provided with the same | Masao Yoshida, Naoyuki Ookubo, Yosaku Maeda | 2016-08-02 |
| 7539413 | Observation apparatus and observation system | Hiroaki Munehira, Junichi Nakagawa, Toshiyuki Tokura, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2009-05-26 |
| 7437070 | Submarine observation apparatus and submarine observation system | Tasuku Fujieda, Hideki Goto, Hitoshi Mikada, Katsuyoshi Kawaguchi | 2008-10-14 |
| 7276811 | Submarine power feeding system having submarine feeding cables and power feeding branching devices | Jun Muramatsu, Katsuyoshi Kawaguchi | 2007-10-02 |
| 7166933 | Submarine power feeding branching device for submarine power feeding system having submarine feeding cables arranged in mesh pattern | Jun Muramatsu, Katsuyoshi Kawaguchi | 2007-01-23 |
| 7102257 | Submarine cable power feeding system | Jun Muramatsu, Katsuyoshi Kawaguchi | 2006-09-05 |
| 6563236 | Feed line switching circuit and branching unit | Satoshi Kumayasu, Eiichi Nakagawa, Kazunori Sato | 2003-05-13 |
| 6157098 | Feed line connection circuit and optical transmission system | Junichi Kojima, Koji Goto, Toshio Kawazawa, Koh-ichi Tatekura, Etsuo Nazuka | 2000-12-05 |
| 5790358 | Feeding pass switching circuit | Junichi Kojima, Naoki Norimatsu, Hitoshi Nishikawa | 1998-08-04 |
| 5764061 | Maritime apparatus for locating a buried submarine cable | Satoru Takagi | 1998-06-09 |
| 5110544 | Stainless steel exhibiting excellent anticorrosion property for use in engine exhaust systems | Eiji Sato, Ryo Matsuhashi, Satoshi Ito, Kazuhiro Tano | 1992-05-05 |
| 4946748 | Highly anticorrosive coated steel sheet for fuel vessel and process for production thereof | Seijun Higuchi, Toshinori Mizuguchi, Minoru Fujinaga | 1990-08-07 |
| 4911522 | Core alignment system for optical fibers | Yoshinao Iwamoto, Yuichi Shirasaki, Masayuki Fujise | 1990-03-27 |
| 4891274 | Hot-dip aluminum coated steel sheet having excellent corrosion resistance and heat resistance | Seijun Higuchi, Takayuki Ohmori, Koji Umeno, Nobuyoshi Okada, Minoru Fujinaga +2 more | 1990-01-02 |
| 4784731 | Chromate treatment of a metal coated steel sheet | Seijun Higuchi, Akinori Maruta, Akimitsu Fukuda, Haruyoshi Terada, Youji Ono | 1988-11-15 |
| 4731301 | Tinned steel sheet having a high degree of corrosion resistance and a method of producing the same | Seijun Higuchi, Yashichi Oyagi, Tomonari Oga, Toshinori Mizuguchi, Senkichi Tsujimura +2 more | 1988-03-15 |
| 4678371 | Burying device for submarine cables and method for guiding the same | Kazuomi Yamamura, Hideo Ishihara, Yoshinao Iwamoto, Shizuo Suzuki, Yuichi Sirasaki | 1987-07-07 |
| 4641915 | Rotary joint for optical fibers | Yuichi Shirasaki, Yoshinao Iwamoto | 1987-02-10 |
| 4637686 | Optical fiber with light reflecting particles dispersed through buffer layers to dissipate leaky cladding modes | Yoshinao Iwamoto, Yuichi Shirasaki, Masayuki Fujise | 1987-01-20 |
| 4625172 | Apparatus for supplying AC current to an underwater cable | Kazuomi Yamamura, Hideo Ishihara, Yoshinao Iwamoto, Shizuo Suzuki, Yuichi Sirasaki | 1986-11-25 |
| 4584211 | Continuous hot dip aluminum coating method | Seizun Higuchi, Nobuyoshi Okada | 1986-04-22 |
| 4544233 | Underwater optical fiber connector | Yoshinao Iwamoto, Yuichi Shirasaki, Masayuki Fujise | 1985-10-01 |
| 4540942 | Alternating current induction method using an annular magnetic coupling body for detecting the position of a buried submarine cable | Kazuomi Yamamura, Hideo Ishihara, Yoshinao Iwamoto, Shizuo Suzuki, Yuichi Sirasaki | 1985-09-10 |
| 4492492 | Guiding method for cable burying device and a device therefor | Toshio Izawa, Yoshinao Iwamoto, Yuichi Shirasaki | 1985-01-08 |