| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 | |
| #2 | EPO (European Patent Office) | 6 | |
| #3 | Taiwan | 6 | |
| #4 | China | 4 | |
| #5 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Optics | |
| #3 | Machines | |
| #4 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Frames | |
| #2 | Cameras | |
| #3 | Unspecified technologies | |
| #4 | Television | |
| #5 | Springs |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ishikawa Masao | 11 |
| #2 | Hida Nobuyuki | 9 |
| #3 | Yamaguchi Minoru | 7 |
| #4 | Minoru Yamaguchi | 2 |
| #5 | Nobuyuki Hida | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US5553821A | Counterbalancing unit | |
| JPH0544890A | Universal head | |
| US4979709A | Tripod head | |
| US4959671A | Vertical tilting apparatus of tripod head |