Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11097969 | Membrane separation method and device provided with particle sorting device | Hiroshi Noguchi, Guihe Tao, Terutake Niwa, Yingjie Lee, Jia Ting Yen +2 more | 2021-08-24 |
| RE39475 | Digitizer having flat tablet with magnetic shield plate | Azuma Murakami | 2007-01-23 |
| 6362468 | Optical unit for detecting object and coordinate input apparatus using same | Azuma Murakami, Yasuji Ogawa | 2002-03-26 |
| 6064374 | Cordless electronic pen with cartridge | — | 2000-05-16 |
| 6020849 | Position detecting apparatus and pointing device thereof | — | 2000-02-01 |
| 5948103 | Electronic document security system, affixed electronic seal security system and electronic signature security system | — | 1999-09-07 |
| 5792997 | Position transducer and position sensing method | — | 1998-08-11 |
| 5734377 | Data matching method, coordinate input method, and coordinate input system | — | 1998-03-31 |
| 5731801 | Two-handed method of displaying information on a computer display | — | 1998-03-24 |
| 5714984 | Position detecting device and position pointing device therefor | Yuji Katsurahira | 1998-02-03 |
| 5706000 | Position detecting device and position pointing device therefor | Yuji Katsurahira | 1998-01-06 |
| 5699084 | Computer system | — | 1997-12-16 |
| 5691748 | Computer system having multi-device input system | — | 1997-11-25 |
| 5672852 | Position pointing device including a memory and a position detecting device coupled by AC fields to the pointing device | Yuji Katsurahira | 1997-09-30 |
| 5661269 | Position pointing device having resonant circuit with sequentially changed characteristics and combination thereof with position detecting device | Yuji Katsurahira | 1997-08-26 |
| 5644108 | Position detection device utilizing electromagnetic induction | Yuji Katsurahira | 1997-07-01 |
| 5635684 | Position detecting device and its method | — | 1997-06-03 |
| 5629500 | Position pointing device, system and method employing AC field | Yuji Katsurahira | 1997-05-13 |
| 5600105 | Position detecting device and position pointing device therefor | Yuji Katsurahira | 1997-02-04 |
| 5530210 | Coordinate detecting device | — | 1996-06-25 |
| 5371835 | Inductively coupled neural network | Norio Akamatsu, Azuma Murakami, Ryuichi Yamane, Sadao Yamamoto | 1994-12-06 |
| 5130500 | Digitizer having flat tablet with magnetic shield plate | Azuma Murakami | 1992-07-14 |
| 4956526 | Digitizer having flat tablet with magnetic shield plate | Azuma Murakami | 1990-09-11 |