Michael L. Clark
47Patents
19h-index
25Co-inventors
81Inventor score
Filing activity: Sep 30, 1993 → Sep 23, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5375768A | Multiple range variable speed turbine | Performing Operations; Transporting | 85 | Expired |
| US6817543B2 | Toggle over-center mechanism for shifting the reversing mechanism of an oscillating rotor type sprinkler | Performing Operations; Transporting | 58 | Expired |
| US6695223B2 | Adjustable stator for rotor type sprinkler | Performing Operations; Transporting | 56 | Expired |
| US6957782B2 | Irrigation spray nozzle with two-piece color identifier and radially shaped orifice | Performing Operations; Transporting | 56 | Expired |
| US7040553B2 | Rotor type sprinkler with reversing mechanism including sliding clutch and driven bevel gears | Performing Operations; Transporting | 54 | Expired |
| US6840460B2 | Rotor type sprinkler with insertable drive subassembly including horizontal turbine and reversing mechanism | Performing Operations; Transporting | 49 | Expired |
| US6848632B2 | Pop-up irrigation sprinkler having bi-level debris strainer with integral riser ratchet mechanism and debris scrubber | Performing Operations; Transporting | 44 | Expired |
| US7677469B1 | Sprinkler with reversing planetary gear drive | Performing Operations; Transporting | 37 | Active |
| US7503346B1 | Solenoid actuated pilot valve for irrigation system valve | Emerging Cross-Sectional Technologies | 29 | Active |
| US5411372A | Pole mounted revolving air circulating fan | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US7748646B2 | Gear driven sprinkler with top turbine | Performing Operations; Transporting | 28 | Active |
| US7665713B1 | Sleeve valve for residential and commercial irrigation systems | Mechanical Engineering; Lighting; Heating | 28 | Active |
| US8272578B1 | Sprinkler with adjustable arc and adjustable radius | Performing Operations; Transporting | 24 | Active |
| US9253950B1 | Low flow emitter with exit port closure mechanism for subsurface irrigation | Performing Operations; Transporting | 22 | Active |
| US8297314B2 | Solenoid actuated pilot valve for irrigation system valve | Emerging Cross-Sectional Technologies | 20 | Active |
| US9814189B1 | Low flow emitter with exit port closure mechanism for subsurface irrigation | Performing Operations; Transporting | 20 | Active |
| US9699974B2 | Rotor-type sprinkler with pressure regulator in outer case | Performing Operations; Transporting | 19 | Active |
| US8727238B1 | Irrigation sprinkler with re-configurable secondary nozzle holder | Performing Operations; Transporting | 19 | Active |
| US8469288B1 | Reversing mechanism for an irrigation sprinkler with a reversing planetary gear drive | Mechanical Engineering; Lighting; Heating | 19 | Active |
| US6899146B2 | Method and apparatus for dispensing compressed natural gas and liquified natural gas to natural gas powered vehicles | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US8220723B2 | Gear driven sprinkler with top turbine | Performing Operations; Transporting | 16 | Active |
| US8794542B1 | Sprinkler with top-side remotely vented pressure regulator | Performing Operations; Transporting | 15 | Active |
| US7222647B2 | Apparatus for dispensing compressed natural gas and liquified natural gas to natural gas powered vehicles | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US9296004B1 | Rotor-type sprinkler with pressure regulator in outer case | Performing Operations; Transporting | 14 | Active |
| US8777124B2 | Irrigation sprinkler with ratcheting manual nozzle rotation | Textiles; Paper | 14 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.