| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 15 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Thermal processes | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Domestic heating systems | |
| #3 | Preheating for stem generation | |
| #4 | Steam traps | |
| #5 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blessing James H | 18 |
| #2 | Townsend Frederick | 2 |
| #3 | Osgood Ralph R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US930135A | Valve. | |
| US826221A | Steam-trap. | |
| US741448A | Steam-trap. | |
| CA54787A | Water filter | |
| CA20052A | Stop cock | |
| CA3513A | Steam trap | |
| CA16922A | Improvements in valves | |
| CA23780A | Art of making dry sand cores and apparatus therefor | |
| CA17685A | Check valve | |
| CA20033A | Valve | |
| CA18964A | Check valve | |
| CA19176A | Stop valve | |
| CA20021A | Combined check and stop valve | |
| CA2080A | A steam trap | |
| CA16745A | Improvements on friction clutches | |
| CA17686A | Straightway check valve | |
| CA18829A | Friction clutch | |
| CA16903A | Combined check valve, stop cock and blow-off cock |