Douglas P. Gethmann
26Patents
11h-index
21Co-inventors
71Inventor score
Filing activity: Jun 26, 1991 → Jun 30, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6095196A | Tortuous path fluid pressure reduction device | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5769122A | Fluid pressure reduction device | Emerging Cross-Sectional Technologies | 53 | Expired |
| US5180139A | Rotary ball fluid control valve with noise attenuator | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5332004A | Rotary noise attenuator | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5941281A | Fluid pressure reduction device | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5400825A | Rotary noise attenuator | Emerging Cross-Sectional Technologies | 26 | Expired |
| US7219691B2 | Control valve positioner mounting system | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6733000B2 | Pivot actuated sleeve valve | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US5193583A | Rotary noise attenuator | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5381817A | Mechanical flexure for motion amplification and transducer with same | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6382253B1 | Fluid pressure reduction device with integral guides | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5163463A | Mechanical flexure for motion amplification and transducer with same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6939074B2 | Stem connector assembly | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7178785B2 | Stem arrangement for pivot actuated sleeve valve | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US6929245B2 | Stem to sleeve connection for pivot actuated sleeve valve | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US6416268B2 | Mechanical fastening apparatus | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6874761B2 | Pivot actuated sleeve valve | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5265637A | Mechanical flexure for motion amplification and transducer with same | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7832327B2 | Ring sealed diaphragm | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US7472716B2 | Valve packing removal device | Emerging Cross-Sectional Technologies | 3 | Active |
| US8070127B2 | Manual override apparatus for linear actuators | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7172172B2 | Valve packing removal device | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6213150A | Fluid pressure reduction disks with taper nut retention device | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7624963B2 | Valve flow adjustment device | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US7410144B2 | Pivot and bearing assembly for a manual valve operator | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.