Hayden Leason
9Patents
8h-index
3Co-inventors
58Inventor score
Filing activity: May 19, 1977 → May 1, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4113627A | Process for making hermetically sealed filter units and filters made thereby | Emerging Cross-Sectional Technologies | 161 | Expired |
| US4414172A | Process and apparatus for sealing a plurality of filter elements | Performing Operations; Transporting | 99 | Expired |
| US4749003A | Center flow check valve | Emerging Cross-Sectional Technologies | 93 | Expired |
| US5049274A | Friction welding process and filter formed thereby | Mechanical Engineering; Lighting; Heating | 55 | Expired |
| US4828694A | Filter with filtration envelope spacing means | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US4601820A | Low-profile inline filter | Performing Operations; Transporting | 24 | Expired |
| US4400277A | Low-profile inline filter | Performing Operations; Transporting | 17 | Expired |
| US4547190A | Inlet blood filter assembly | Human Necessities | 8 | Expired |
| USD310421S | Flat brick border section | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.