| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Mechanical elements | |
| #4 | Thermal processes | |
| #5 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Installations for obtaining water | |
| #3 | Pipes | |
| #4 | Venting or aerating devices | |
| #5 | Burners | |
| #6 | Furnaces | |
| #7 | Tools for connecting or disengaging |
| # | Name | Total Patents |
|---|---|---|
| #1 | O'Brien Denis F | 14 |
| Publication | Filing date | Title |
|---|---|---|
| US2267533A | Frangible hydrant | |
| US2249848A | Frangible hydrant | |
| US1781698A | Valve-inserting method and mechanism | |
| US1553953A | Hydrant | |
| US1174342A | Means for inserting valves in pipes. | |
| US1185927A | Branch-pipe connection. | |
| US1181157A | Gate-valve mechanism. | |
| US795057A | Hydrant. | |
| US875729A | Connecting branch sleeve. | |
| US838509A | Hydrant and valve mechanism for the same and other purposes. | |
| US789228A | Combined hydrocarbon vaporizer and burner. | |
| US694298A | Hydrant. | |
| US694180A | Hydrant. | |
| US694179A | Hydrocarbon apparatus. |