Michael T. Landrum
14Patents
6h-index
8Co-inventors
59Inventor score
Filing activity: May 12, 1980 → Jul 10, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5613516A | Combination hydraulic pressure regulator and pressure switch | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4471805A | Control valve | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5617771A | Auto cycle pump | Performing Operations; Transporting | 15 | Expired |
| US5676169A | Counterbalance valve | Emerging Cross-Sectional Technologies | 11 | Expired |
| USD520522S1 | Hand pump | General | 9 | Expired |
| US4352644A | Air-hydraulic pump | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US9193046B2 | Auto cycle pump and method of operation | Emerging Cross-Sectional Technologies | 6 | Active |
| US9719351B2 | Rotary vane motor with split vane | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US7316177B2 | Hydraulic hand pump with locking device | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US9206688B2 | High torque rotary motor with multi-lobed ring with inlet and outlet | Emerging Cross-Sectional Technologies | 2 | Active |
| US8192173B2 | Pressure compensated and constant horsepower pump | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7950910B2 | Piston cartridge | Emerging Cross-Sectional Technologies | 1 | Active |
| US9945494B2 | Pneumatic directional valve and method of operation | Emerging Cross-Sectional Technologies | 0 | Active |
| US9470324B2 | Directional valve and method of operation | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.