| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Basic communication technologies | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Spraying devices | |
| #2 | Venting or aerating devices | |
| #3 | Unspecified technologies | |
| #4 | Domestic plumbing installations | |
| #5 | Amplifiers | |
| #6 | Measuring nuclear radiation | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bletcher Ralph E | 6 |
| #2 | Ward Irving A | 5 |
| #3 | Bucknell Ernest H | 5 |
| #4 | Bentley Clarence H | 3 |
| #5 | Edwin Bletcher Ralph | 2 |
| #6 | Leslie Lynch | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3460570A | Balanced control mixing valve | |
| US2726120A | Shower head | |
| US2706998A | Ball cock | |
| US2646515A | Direct current amplifier | |
| US2684082A | Surface fitting | |
| US2675218A | Water aerator | |
| US2657954A | Shower head | |
| US2580722A | Shower head | |
| US2608412A | Antisiphon spout and spray fixture | |
| US2452354A | Faucet valve element | |
| US2423960A | Shower head | |
| CA816452A | Coaxial control valve |