| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 4 | |
| #3 | France | 3 | |
| #4 | Germany | 2 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Civil engineering | |
| #3 | Furniture and games | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Platform constructions | |
| #3 | Household appliances | |
| #4 | Unspecified technologies | |
| #5 | Springs |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sarkisian Robert | 9 |
| #2 | Hillstrom David U | 4 |
| #3 | Hillstrom David Uno | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4288053A | Adjustable sign mounting bracket | |
| US4265040A | Two-sided display devices | |
| DE2835679A1 | Display holder with track members - has elongated extrusions mating with corresponding ribs on backing member to securely grid and hold advertising materials | |
| CA1097916A | Display holder | |
| US4033536A | Mounting bracket coil spring | |
| US4138787A | Display holder | |
| US4041632A | Art frame | |
| CA970564A | Poster display device | |
| CA900167A | Display holder |