| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Control | |
| #4 | Materials and metallurgy | |
| #5 | Thermal processes | |
| #6 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Servomotors | |
| #3 | Unspecified technologies | |
| #4 | Venting or aerating devices | |
| #5 | Systems controlling non-electric variables | |
| #6 | Vehicle suspension arrangements | |
| #7 | Pipes | |
| #8 | Pistons and sealings | |
| #9 | Refrigerators | |
| #10 | Casting metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | May Edward M | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US2872217A | Dirt shield for swivel joints | |
| US2635931A | Rotary joint with fluid seal | |
| US2503447A | Follow-up type power amplifier | |
| US2434668A | Fluid pressure apparatus | |
| US2230842A | Refrigerating apparatus | |
| US2250130A | Float valve | |
| US2065087A | Valve | |
| US2011007A | Method of making composite valves | |
| US2065086A | Valve | |
| US1964687A | Composite valve | |
| US1242574A | Shock-absorber. | |
| CA518897A | Apparatus for synchronizing the speeds of power-driven mechanisms | |
| CA541035A | Method of making rotatable cams |