| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | Spain | 1 | |
| #5 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Gearing | |
| #4 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Shenk Robert H | 11 |
| #2 | Crankshaw John H | 5 |
| #3 | Beecher Donald J | 2 |
| #4 | Shenk Robert Henry | 1 |
| #5 | Edward Pontius Paul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2873589A | Flexible coupling sleeve with spacer connection | |
| US2924985A | Flexible coupling v-drive | |
| US2867100A | Seal assembly | |
| US2873588A | Flexible coupling | |
| US2871681A | Shaft coupling | |
| ES219856A3 | Improvements in couplings for transmission trees (Machine-translation by Google Translate, not legally binding) | |
| US2796750A | Spacer coupling | |
| US2853860A | Coupling with end play device | |
| GB738860A | A positive clutch | |
| GB731109A | Gear coupling | |
| GB738680A | Flexible shaft coupling | |
| US2771794A | Reversible reduction transmission | |
| US2682760A | Gear coupling | |
| US2698529A | Flexible shaft coupling | |
| US2640573A | Synchronizer clutch | |
| US2513684A | Shaft coupling | |
| US2110844A | Flexible shaft coupling | |
| CA509209A | Gear coupling | |
| CA520506A | Gear coupling | |
| CA509208A | Flexible shaft coupling |