| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 28 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Machine tools | |
| #4 | Engines, pumps and turbines | |
| #5 | Transport | |
| #6 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Gearing | |
| #3 | Forging | |
| #4 | Shafts | |
| #5 | Centrifuges | |
| #6 | Cyclically operating valves | |
| #7 | Springs | |
| #8 | Accessories for machine tools | |
| #9 | Vehicle wheels | |
| #10 | Domestic washing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keiper Henry B | 30 |
| #2 | Keiper John M | 1 |
| #3 | Keiper Lanions B | 1 |
| #4 | Smith Alba B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1353044A | Ball retainer and separator for thrust-bearings | |
| US1328250A | Combination-tool | |
| US1241988A | Cream-separator. | |
| US1171211A | Internal-combustion engine. | |
| US1221187A | Knockdown forge. | |
| US1189259A | Valve. | |
| US1127016A | Shock-absorber. | |
| US1243181A | Reaction shock-absorber. | |
| US1263563A | Internal-combustion engine. | |
| US1137330A | Drill-driving mechanism. | |
| US1097550A | Demountable rim. | |
| US997921A | Antifriction-bearing. | |
| US997920A | Ball and roller bearing. | |
| US890658A | Knife polishing or sharpening machine. | |
| US874893A | Twyer. | |
| US767282A | Drilling-machine. | |
| US758840A | Screw-cutting implement. | |
| US736977A | Centrifugal separator. | |
| US736978A | Centrifugal separator. | |
| US804860A | Rotary blower. |