| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Chairs and beds | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Metal wire processing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Karr Charles D | 18 |
| Publication | Filing date | Title |
|---|---|---|
| US2058463A | Spring assembly | |
| US2058462A | Spring mattress assembly | |
| US2021238A | Mattress and handle therefor | |
| US2099427A | Bedding pad | |
| US2074399A | Bedspring and cover retaining clip therefor | |
| US2021237A | Sleeping pad | |
| US2013562A | Sleeping pad | |
| US1938489A | Spring assembly | |
| US1964950A | Spring assembly | |
| US1906612A | Spring assembly | |
| US1918399A | Spring assembly | |
| US1841410A | Pad holder | |
| US1656204A | Apparatus and process for fabricating spring assemblies | |
| US1257610A | Bed-spring. | |
| US1291912A | Bed-spring. | |
| CA359661A | Spring assembly | |
| CA371726A | Spring mattress assembly | |
| CA371727A | Spring assembly |