David E. Sisk
63Patents
17h-index
10Co-inventors
81Inventor score
Filing activity: Jan 10, 1986 → Aug 5, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD653734S1 | Screened gasket | General | 533 | Expired |
| USD372765S | Gasket | General | 48 | Expired |
| US5540465A | Pipe, valve and/or tee coupler | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5360030A | Butterfly valve incorporating sleeve seals | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4822001A | Positive fluid seal butterfly valve | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4699357A | Reinforced industrial butterfly valve | Emerging Cross-Sectional Technologies | 25 | Expired |
| USD297678S | Cast hopper tee | General | 25 | Expired |
| US5722666A | Pipe coupler gasket with triangular sealing ridges | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4848396A | Cast hopper tee | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4889318A | Molded hopper tee | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US7055440B2 | Remotely operated manhole cover for a tanker | Performing Operations; Transporting | 22 | Expired |
| US5842681A | Pivotal hopper tee with alignable swing-away hopper tee assembly | Emerging Cross-Sectional Technologies | 20 | Expired |
| USD673657S1 | Fluted drop tee | General | 20 | Active |
| US6952996B2 | Remotely operated manhole cover for a tanker | Performing Operations; Transporting | 18 | Expired |
| US5387015A | Hopper tee | Performing Operations; Transporting | 17 | Expired |
| US5053063A | Dust filtering and collection system | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5017053A | Aeration device for bulk material containers | Performing Operations; Transporting | 17 | Expired |
| US5207411A | Butterfly valve assembly | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6786362B2 | Swing-away hopper tee | Performing Operations; Transporting | 14 | Expired |
| US5067856A | In-line air filter for dry bulk tank trailers | Performing Operations; Transporting | 13 | Expired |
| US5676404A | Low profile flanged tee | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| USD358202S | Reinforced structural tee | General | 12 | Expired |
| US7520925B2 | Filter and silencer with a quick disconnect lid | Performing Operations; Transporting | 10 | Active |
| US5988867A | Preassembled fluidizing device having expansive air passage stimulating enhanced flow of granular materials in tank trailers and containers | Performing Operations; Transporting | 10 | Expired |
| US7988386B2 | Split collar with offset hook and hinge hopper assembly | Emerging Cross-Sectional Technologies | 10 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.