| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Chemical engineering | |
| #5 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Sawing | |
| #4 | Pistons and sealings | |
| #5 | Pipes | |
| #6 | Unspecified technologies | |
| #7 | Non-positive-displacement pumps | |
| #8 | Separation | |
| #9 | Nails | |
| #10 | Tools for connecting or disengaging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ferdinand Hinrichs | 7 |
| #2 | Kessler Joseph S | 4 |
| #3 | Thomsen Lars C | 1 |
| #4 | Moses John H | 1 |
| #5 | Bastrup Kay L | 1 |
| #6 | Hinrichs Ferdinand | 1 |
| #7 | Foulke Edgar J | 1 |
| #8 | Edward Onosko | 1 |
| #9 | Hinriches Ferdinand | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2687872A | Sanitary valve | |
| US2615673A | Lift plug valve | |
| US2649632A | Toggle type connecting assembly | |
| US2576298A | Shaft keying and locking construction | |
| US2615672A | Seal for axially movable rotary plug valves | |
| US2628059A | Lift plug valve | |
| US2456128A | Pump and impeller therefor | |
| US2489362A | Line filter | |
| US2544161A | Compression valve | |
| US2544160A | Valve | |
| US2489369A | Vise | |
| US2509162A | Packing construction for pump shafts or the like | |
| US2521166A | Relief valve | |
| US2483581A | Valve | |
| US1711432A | Milk valve | |
| CA491410A | Lift plug valves | |
| CA491411A | Seals for plug valves |