| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Argentina | 2 | |
| #3 | Belgium | 2 | |
| #4 | Brazil | 2 | |
| #5 | Canada | 2 | |
| #6 | Germany | 2 | |
| #7 | Spain | 2 | |
| #8 | France | 2 | |
| #9 | United Kingdom | 2 | |
| #10 | Italy | 2 | |
| #11 | South Africa | 2 | |
| #12 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Internal-combustion piston engines | |
| #3 | Rotary-pistons | |
| #4 | Climate change mitigation in transportation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Williams B | 6 |
| #2 | Williams Benjamin F | 5 |
| #3 | Williams B F | 2 |
| #4 | Williams Benjamin Franklin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4170213A | Rotary engine | |
| US3780709A | Rotary engine having axially sliding vanes | |
| US3787153A | Positive displacement machine such as a pump |