| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 3 | |
| #3 | Germany | 3 | |
| #4 | France | 2 | |
| #5 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Load transportation vehicles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Parmesan Daniel J | 6 |
| #2 | Stillwagon Crawford K | 5 |
| #3 | Parmesan Daniel Joseph | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE840178C | Hose or pipe coupling | |
| GB677685A | Improvements in or relating to a seal ring or gasket of resilient material for use in a pipe coupling | |
| US2576355A | Pulley block adapter device | |
| US2523995A | Union | |
| GB626029A | Improvements in or relating to unions for pipe lines | |
| US2459251A | Threadless pipe coupling | |
| US2459250A | Double seal flange union | |
| US2449795A | Pipe coupling | |
| CA475419A | Unions | |
| CA451130A | Snatch block | |
| CA451129A | Union |