| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 | |
| #3 | France | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Lighting device details |
| # | Name | Total Patents |
|---|---|---|
| #1 | Greenlaw Warren A | 9 |
| #2 | Greenlaw Warren Alfred | 2 |
| #3 | Ryan Charles F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1173259A | Reduction-valve. | |
| CA141656A | Train pipe coupling | |
| CA141654A | Pipe joint | |
| US1039731A | Coupling for train-pipes. | |
| US978876A | Flexible pipe-joint. | |
| US918144A | Flexible pipe-joint. | |
| US930071A | Flexible pipe-joint. | |
| US916301A | Flexible pipe-joint. | |
| US927462A | Flexible pipe-joint. | |
| US918443A | Flexible pipe-joint. | |
| CA111837A | Flexible pipe joint |