| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Electrical machinery and energy | |
| #3 | Civil engineering | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Electric motor controls | |
| #3 | Electric switches | |
| #4 | Magnets and transformers | |
| #5 | Clutches and brakes | |
| #6 | Doors and windows | |
| #7 | Hinges for doors or windows | |
| #8 | Winches | |
| #9 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Shepard Oscar F | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2175323A | Elevator closure | |
| US2207166A | Elevator transmission | |
| US2057210A | Floor leveler for elevators | |
| US2086002A | Elevator | |
| US1890754A | Motor control | |
| US1835906A | Alternating current relay | |
| US1743627A | Elevator control | |
| US1684520A | Chain transmission for elevator devices | |
| US1789417A | Polyphase magnet | |
| US1628202A | Electric brake | |
| US1713304A | Reversing switch | |
| US1810441A | Motor control |