| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 3 | |
| #3 | Germany | 2 | |
| #4 | Denmark | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Netherlands | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Transport or storage devices | |
| #2 | Blasting | |
| #3 | Venting or aerating devices | |
| #4 | Swimming pools | |
| #5 | General building constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tuyl David H Van | 5 |
| #2 | Van Tuyl D | 2 |
| #3 | Hawthorne Van Tuyl David | 1 |
| #4 | Cleary M | 1 |
| #5 | Van Tuyl David Hawthorne | 1 |
| #6 | Vantuyl David H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3740018A | Safety control handle for air actuated equipment | |
| US3538662A | Room structure | |
| US3557936A | Conveyor | |
| US3415418A | Metering device | |
| CA895147A | Conveyor | |
| CA895146A | Conveyor | |
| CA848837A | Metering device |