| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Reduction of greenhouse gas emissions | |
| #2 | Machines for liquids | |
| #3 | Hydraulic engineering | |
| #4 | Pipes | |
| #5 | Unspecified technologies | |
| #6 | Unspecified technologies | |
| #7 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Harza Leroy F | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US2457041A | Pipe t | |
| US2324699A | Automatic latch | |
| US2344302A | Revetment and block therefor | |
| US2028448A | Hydraulic turbine | |
| US1791271A | Conduit | |
| US1562556A | Hydraulic turbine | |
| US1493154A | Hydraulic-power station | |
| US1362304A | Hydromotive unit | |
| US1485186A | Hydraulic turbine | |
| US1263059A | Means for increasing the effective head of water produced by a dam during flood stages of water. | |
| CA268361A | Conduit |