| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 28 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Metal-working | |
| #5 | Shafts | |
| #6 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hamer Leland S | 27 |
| #2 | Mcbain Kenneth C | 1 |
| #3 | Keith Macbain Donald | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2688341A | Valve | |
| US2671471A | Angular flow control fitting | |
| US2558247A | Flow control fitting | |
| US2664918A | Line blind construction | |
| US2600497A | Line blind construction | |
| US2646247A | Sealing construction for plug valves | |
| US2615473A | Blinding device for pipe lines | |
| US2695633A | Line blind | |
| US2570545A | Pipe joint | |
| US2649117A | Pipe line fitting | |
| US2499383A | Double gate valve | |
| US2499382A | Flow controlling device | |
| US2573842A | Fluid control | |
| US2635643A | Line blind | |
| US2499380A | Flow control | |
| US2616655A | Gate valve | |
| US2499381A | Line control | |
| US2455121A | Fitting for pipe lines | |
| US2455120A | Pipe-line fitting | |
| US2462493A | Seal for pipe-line fittings |