| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | United States | 6 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Venting or aerating devices | |
| #3 | Earth drilling | |
| #4 | Shafts | |
| #5 | Spraying devices | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Leidecker Frank W | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US1779322A | Check valve | |
| US1571876A | Swar | |
| US1405048A | Check and release valve for well swabs | |
| US1157704A | Temper-screw. | |
| US1124471A | Gage-cock. | |
| CA129576A | Gauge cock | |
| CA98841A | Gauge cock | |
| CA98585A | Globe valve | |
| CA97763A | Lubricator | |
| CA79373A | Water gauge | |
| CA77250A | Valve | |
| US705255A | Check or clack valve. |