| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 1 | |
| #3 | Denmark | 1 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Materials and metallurgy | |
| #3 | Environmental technology | |
| #4 | Transport | |
| #5 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roberts William A | 6 |
| #2 | Hagenson Leo J | 3 |
| #3 | Downs James J | 2 |
| #4 | Hagenson L | 1 |
| #5 | Hagenson Leo Joseph | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5286430A | Incineration residue treatment process | |
| WO8912498A1 | Incineration residue treatment process and apparatus | |
| US5037286A | Incineration residue treatment apparatus | |
| GB1113654A | Folding travel trailer | |
| US3273934A | Folding travel trailer | |
| US3024059A | Collapsible and expanding house trailer |