| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 35 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Control | |
| #3 | Mechanical elements | |
| #4 | Thermal processes | |
| #5 | Chemical engineering | |
| #6 | Environmental technology | |
| #7 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Paulsen Spence | 34 |
| #2 | Tracy Crawford | 1 |
| #3 | Fall John F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3077600A | Railroad crossing | |
| US3067946A | Piloted self-operative hot water supply system | |
| US2967486A | Pump | |
| US2903012A | Adjustable valve-actuating means | |
| US3006362A | Regulating-valve means | |
| US2881792A | Regulating-valve means | |
| US2860657A | Regulating valve | |
| US2952136A | Refrigeration machine | |
| US2952436A | Regulating valve | |
| US2852196A | Water heater | |
| US2820472A | Adjustable valve-actuating means | |
| US2894399A | Rotary-stem actuating means | |
| US2828164A | Conduit-discharge means | |
| US2852283A | Valve | |
| US2831639A | Temperature pilot valve | |
| US2905488A | Flanged elastomeric sleeve type flexible coupling for pipes | |
| US2814311A | Balanced valve-actuating means | |
| US2879792A | Integral-pilot valve | |
| US2788895A | Gravel processing means | |
| US2787285A | Regulating-valve means |