| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Hydraulic engineering | |
| #2 | Ship-lifting devices | |
| #3 | Ships | |
| #4 | Dry-docking of vessels | |
| #5 | Reduction of greenhouse gas emissions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frantisek Jermar | 14 |
| Publication | Filing date | Title |
|---|---|---|
| US3071931A | Panel gate and segment weirs | |
| US2968929A | Arrangement for raising or lowering of heavy bodies using the lifting power of floaters | |
| US2621484A | Hydraulic gate | |
| US2592287A | Hydraulic gate or barrage | |
| US2598389A | Hydrostatic weir, gate, and the like | |
| US2551678A | Hydraulic structure and the like | |
| US2118404A | Hydrostatic weir shutter | |
| US2074610A | Hydrostatic weir shutter | |
| US1994314A | Hydrostatic weir | |
| US1887265A | Weir shutter | |
| US1754108A | Weir shutter | |
| US1737311A | Weir shutter | |
| US1716698A | Hydrostatic weir shutter | |
| US1602111A | Sluice gate |