| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 | |
| #4 | Brazil | 2 | |
| #5 | Germany | 2 | |
| #6 | Canada | 1 | |
| #7 | Switzerland | 1 | |
| #8 | Italy | 1 | |
| #9 | Japan | 1 | |
| #10 | Mexico | 1 | |
| #11 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Venting or aerating devices | |
| #3 | Rotary-pistons | |
| #4 | Pumps | |
| #5 | Motor vehicles | |
| #6 | Earth drilling | |
| #7 | Controlling combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mayer Thomas E | 7 |
| #2 | Story John N | 5 |
| #3 | Tower Henry M | 3 |
| #4 | Bloom Carl | 3 |
| #5 | Dadmun Donald C | 3 |
| #6 | Toomasu Ii Meiyaa | 1 |
| #7 | Yokota George | 1 |
| #8 | Mayer T | 1 |
| #9 | Mccarthy Richard A | 1 |
| #10 | Davis A Hunt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR2482209A1 | Rotary gas-compressor assembly - has pair of cooperating lobed rotors of dissimilar asymmetric configurations and incorporating balancing plugs | |
| FR2482210A1 | Rotary gas-compressor assembly - has pair of cooperating lobed rotors of dissimilar asymmetric configurations and incorporating balancing plugs | |
| GB2073324A | Rotary gas-compressor | |
| US4168722A | Feather valve | |
| US4184508A | Plate valve | |
| US4046209A | Oscillation lockout system for track mounted rock drill |