| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 2 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | Denmark | 1 | |
| #7 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Furniture and games | |
| #5 | Mechanical elements | |
| #6 | Consumer goods |
| # | Name | Total Patents |
|---|---|---|
| #1 | Novak Joel S | 14 |
| #2 | Parsons Natan E | 13 |
| #3 | Parsons Natan S | 1 |
| #4 | Steiner Kenneth M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5456279A | Diaphragm-type pilot valve having a self-cleaning control orifice | |
| US5251188A | Elongated-pattern sonic transducer | |
| US5125621A | Flush system | |
| US4921211A | Method and apparatus for flow control | |
| US4953141A | Sonic distance-measuring device | |
| US4839039A | Automatic flow-control device |