| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 8 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Medical technology | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Consumer goods | |
| #5 | Transport | |
| #6 | Furniture and games | |
| #7 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Smith Alfred A | 18 |
| #2 | Jaisohn Philip | 1 |
| #3 | Lien Howard C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4391006A | Transfer bench | |
| US4044784A | Walking aid cane | |
| US3945389A | Foldable walker | |
| CA950316A | Foldable invalid walker | |
| US3269399A | Combined handle and hand grip for crutches | |
| US3251372A | Friction crutch tip | |
| US3173510A | Guidance system for air cushioned vehicle | |
| US3040757A | Crutch tip | |
| US2413388A | Railway track heater | |
| US1780847A | Electrical fixture | |
| US1711065A | Interchangeable lamp bracket | |
| CA722428A | Adjustable aluminum crutch | |
| CA50744A | Thermometer case | |
| CA726468A | Crutch pad and method of making the same | |
| CA726908A | Friction crutch tip | |
| CA652807A | Crutch tip | |
| CA726469A | Crutch tip | |
| CA885241A | Invalid walker |