Hygrama AG
19Patents
0Active
19Granted
31Portfolio score
Filing activity: Feb 28, 1990 → Oct 9, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6004383A | Membrane dryer for drying moist air with valved scavenger duct | Performing Operations; Transporting | 25 | Expired |
| US6000676A | Microvalve | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5606903A | Rodless pressure cylinder | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US6173744A | Piezoelectric valve | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6959911B2 | Valve with bendable actuating element | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6276257A | Working cylinder, switch valve and pressure-actuated working unit | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6101920A | Pneumatic or hydraulic cylinder with piston position detector mounted in longitudinal groove in cylinder tube surface | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5823088A | Pneumatic actuating arrangement | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US6186175A | Rocker valve with pneumatic pre-control | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5924443A | Device for limiting the prestress of a control spring | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5245910A | Rodless cylinder | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5138935A | Arrangement for attaching a rail to a piston-cylinder type control device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5241897A | Pressurized medium cylinder | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5022499A | Axially slit pressure cylinder with brake means | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US6945276B2 | Valve with unilaterally constrained piezoelectric bending element as actuating device | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5862828A | Oscillating valve for a double acting operating cylinder | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6679162B2 | Working cylinder, switch valve and pressure-actuated working unit | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6321636A | Piston rod-less pneumatic cylinder | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US6283010A | Piston rod-less pneumatic cylinder | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.