| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Couplings | |
| #3 | Unspecified technologies | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Woodruff Leonidas D | 12 |
| #2 | Alexander Charlton A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1867296A | Air line coupling | |
| US1547483A | Double-pivoted ball joint | |
| US1547482A | Pivot-type universal ball joint | |
| US1586276A | Air-line coupling | |
| US1568649A | Ball joint | |
| US1282715A | Interchange coupling device. | |
| US1190062A | Fluid-pressure coupling. | |
| US1102622A | Fluid-pressure coupling for train-pipes. | |
| US1123972A | Pipe-coupling for fluid-pressure coupler-heads. | |
| CA203407A | Jack truck and stand | |
| US1104597A | Safety-lock for coupling-heads. | |
| CA238102A | Ball joint |