| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 5 | |
| #3 | EPO (European Patent Office) | 5 | |
| #4 | Republic of Korea | 3 | |
| #5 | Taiwan | 3 | |
| #6 | China | 1 | |
| #7 | Germany | 1 | |
| #8 | Finland | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | Hong Kong | 1 | |
| #11 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Analysing materials | |
| #3 | Measuring mechanical vibrations | |
| #4 | Geophysics | |
| #5 | Measuring temperature | |
| #6 | Radio navigation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kawakatsu Hiroshi | 16 |
| #2 | Umezawa Takayuki | 7 |
| #3 | Kawakita Takao | 4 |
| #4 | Wakabayashi Kazuhiro | 4 |
| #5 | Hiroshi Kawakatsu | 2 |
| #6 | Ohmatsu Masaaki | 2 |
| #7 | Tanaka Kouichi | 2 |
| #8 | Uematsu Hiroshi | 2 |
| #9 | Iritani Tadamitsu | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP1387152A1 | Coil impedance detection for object detection method and apparatus | |
| US6101873A | Level sensor | |
| CA2060908A1 | Vibrator-type level sensor | |
| US4740726A | Vibrator-type level sensor |