| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 49 | |
| #2 | Canada | 6 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Milling | |
| #3 | Accessories for machine tools | |
| #4 | Grinding or polishing devices | |
| #5 | Grinding tools | |
| #6 | Turning | |
| #7 | Steam traps | |
| #8 | Unspecified technologies | |
| #9 | Separation | |
| #10 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Williams Thomas B | 24 |
| #2 | Smith Frank L | 14 |
| #3 | Albee Hugh M | 11 |
| #4 | Ralys Stanley C | 4 |
| #5 | Dexter Frederick A | 3 |
| #6 | Mcafee Walter E | 3 |
| #7 | Wilcox Philip E | 3 |
| #8 | Smith Frank Lorenzo | 2 |
| #9 | Rogers Leon H | 1 |
| #10 | Stuard James A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2842904A | Grinding head and grinding surface therefor | |
| US2886128A | Separator | |
| US2842903A | Grinding head and grinding surface therefor | |
| GB800413A | Improvements in or relating to valve grinding machines | |
| US2842901A | Valve grinding machines | |
| US2720736A | Valve grinding machine | |
| US2757492A | Grinding heads | |
| US2751727A | Grinding head and grinding surface therefor | |
| US2508015A | Separator blowoff valve | |
| US2541282A | Separator valve | |
| US2466233A | Valve cutting tool | |
| US2408280A | Apparatus for refacing gate valves | |
| US2383755A | Refacing of valve gates | |
| US2416247A | Valve-seat grinder | |
| US2314775A | Cutter head | |
| US2350019A | Valve cutting tool | |
| US2115187A | Pilot attachment | |
| US2076110A | Rotary cutter | |
| US2026488A | Valve-seat facing tool | |
| US2034277A | Rotary cutting tool |