| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | France | 3 | |
| #3 | United States | 3 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Vehicle connections | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spooner Reginald Arthur Willia | 4 |
| #2 | William Spooner Reginald Arthu | 2 |
| #3 | William Spooner Reglnald Arthu | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB575355A | Improvements relating to coupling pins and like devices | |
| US2399581A | Locking or coupling pin, short shaft, and similar devices | |
| CA440711A | Coupling or connecting device | |
| CA421704A | Coupling or engaging device | |
| CA421703A | Connecting device | |
| CA424418A | Coupling pin, short shaft, etc. |