| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 | |
| #2 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Computer technology | |
| #3 | Medical technology | |
| #4 | Optics | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Television | |
| #2 | Image data processing | |
| #3 | Diagnosis and surgery | |
| #4 | Measuring light | |
| #5 | Optical systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tsuruoka Takao | 18 |
| #2 | Horiuchi Kazuhito | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JP2000318381A | Pencil sharpening aid with knife |