| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Windows or door furnishings | |
| #2 | Unspecified technologies | |
| #3 | Office furniture | |
| #4 | Chairs and beds | |
| #5 | Nails | |
| #6 | Structural elements | |
| #7 | Hinges for doors or windows | |
| #8 | Machines for making railways |
| # | Name | Total Patents |
|---|---|---|
| #1 | Janson Richard W | 14 |
| #2 | Janson Wilford S | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4637324A | Furniture assembly and assembly device | |
| US4318252A | Joist assembly for stage equipment support system | |
| US4285095A | Channel strut for stage equipment support system | |
| US4166306A | Curtain suspension assembly | |
| US4102007A | Curtain suspension assembly | |
| US4014071A | Curtain suspension assembly | |
| US3975792A | Double track drapery guide assembly | |
| US3314470A | Stage curtain pulley mount construction |