| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 3 | |
| #3 | Germany | 3 | |
| #4 | France | 3 | |
| #5 | Belgium | 2 | |
| #6 | United Kingdom | 2 | |
| #7 | Sweden | 2 | |
| #8 | Australia | 1 | |
| #9 | Denmark | 1 | |
| #10 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing | |
| #2 | Unspecified technologies | |
| #3 | Doors and windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hetman Frank W | 6 |
| #2 | Baron Robert N | 2 |
| #3 | Hetman F | 2 |
| #4 | Hetman F W | 2 |
| #5 | Furanku Daburiyuu Hetoman | 1 |
| #6 | Robaato Enu Baron | 1 |
| #7 | Labissoniere R | 1 |
| #8 | Rakouska Kenneth | 1 |
| #9 | L La Bisoniere Robert | 1 |
| #10 | Baron R N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4136419A | Apparatus for cleaning a column of windows and wall surfaces of a building | |
| US3604049A | Squeegee vacuum pickup unit for mobile window washer | |
| US3462884A | Insulated metal frame and sliding closure | |
| US3289377A | Insulated frame and connector therefor | |
| CA911663A | Squeegee vacuum pickup unit for mobile window washer | |
| CA832711A | Self-propelled device for cleaning the window and wall surfaces of a building structure | |
| CA845431A | Insulated metal frame and sliding closure |