| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 2 | |
| #2 | United States | 2 | |
| #3 | Australia | 1 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Finland | 1 | |
| #8 | Republic of Korea | 1 | |
| #9 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Percussive tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hamada Takatoshi | 11 |
| #2 | Huang Wen-Ho | 8 |
| #3 | Hwang Wen-Ho | 1 |
| #4 | Ko Fumikazu | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0236721A2 | Hydraulic breaker | |
| JPS6374580A | Hydraulic type breaker | |
| JPS62218081A | Hydraulic type breaker |