| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Servomotors | |
| #3 | Pipes | |
| #4 | Chemical or physical processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Snyder Robert E | 10 |
| #2 | Snyder Robert Earl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2713992A | Impact drill | |
| US2694551A | Impact drill | |
| US2714500A | Impact drill | |
| US2688984A | Hydropneumatic accumulator | |
| US2641445A | Combined rotary and impact drill with fluid coupling | |
| US2634951A | Impact drill | |
| GB630049A | Improvements in or relating to a rotary impact drill | |
| US2592613A | Self-compensating accumulator | |
| US2635852A | Impact drill | |
| US2663320A | Accumulator | |
| US2425012A | Impact drill | |
| CA456207A | Drill |