| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United Kingdom | 4 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Leach Robert William | 13 |
| #2 | Bateman William Henry | 3 |
| #3 | Scoltock Harry | 2 |
| #4 | Dix Stanley Grimsdell | 1 |
| #5 | Saunders Henry Arthur | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB108410A | Improvements relating to Plug Cocks. | |
| GB190819568A | Improvements relating to the Manufacture of Metal Tubes. | |
| GB190504226A | Improvements in Apparatus for Bending Pipes & the like. | |
| GB190502218A | Improved Means for Packing or Stuffing Metal Tubes Preparatory to Bending or other Operations | |
| CA274863A | Tap, valve, etc. | |
| CA342536A | Valve | |
| CA267436A | Tap | |
| CA292069A | Valve | |
| CA278482A | Valve or cock | |
| CA402453A | Fluid controlling valve | |
| CA278483A | Valve or cock | |
| CA329154A | Valve | |
| CA333875A | Valve or cock |