| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Control |
| # | Technology | |
|---|---|---|
| #1 | Servomotors | |
| #2 | Pumps | |
| #3 | Unspecified technologies | |
| #4 | Systems controlling non-electric variables | |
| #5 | Venting or aerating devices | |
| #6 | Positive-displacement engines | |
| #7 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Griffith Raymond C | 11 |
| #2 | Griffith Dorothy E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3295459A | Hydraulic pumps | |
| US3225701A | Hydraulic pumps | |
| US2984983A | Temperature compensating hydraulic cylinder | |
| US2882686A | Hydraulic system | |
| US2784700A | Reciprocally driven hydraulic device with manually actuated shut-off valve providingfluid by-pass | |
| US2679865A | Mixing faucet | |
| US2581855A | Valve | |
| US2478481A | Hydraulic motor of the wobble plate type | |
| US2513476A | Temperature compensating means | |
| CA798635A | Hydraulic pump | |
| CA602177A | Reciprocally driven hydraulic device with manually actuated shutoff valve providing fluid by-pass |