Hans Langen
53Patents
10h-index
60Co-inventors
81Inventor score
Filing activity: Dec 23, 1974 → Jul 27, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4944354A | Three-point coupling device | Human Necessities | 29 | Expired |
| US4218159A | Multiple-part hobbing cutter | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5462303A | Side strut for a lower steering arm of a tractor | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4193953A | Hydrosol droplet casting process for production of nuclear fuel and breeder material granules | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5702877A | Color photographic silver halide material | Physics | 13 | Expired |
| US4749643A | Photographic recording element containing a UV absorbent and a silver halide emulsion layer | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5042588A | Lifting strut for a tractor | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4943519A | Light sensitive, stabilized photographic recording material | Physics | 11 | Expired |
| US5718634A | Torque limiting coupling | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5538474A | Driveshaft length adjusting mechanism with two profiles | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4459130A | Solid preparation of water-soluble acid dye and polymer particles with quaternary ammonium or phosphonium groups | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5075207A | Color photographic recording material containing new colored cyan couplers | Physics | 8 | Expired |
| US4963465A | Color photographic negative recording material | Physics | 8 | Expired |
| US5366043A | Lubricating device for two plunging profiles slidable inside one another, especially of a propeller shaft | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5108883A | Color photographic recording material | Physics | 7 | Expired |
| US4003748A | Incorporation process | Physics | 7 | Expired |
| US6102804A | Lubricating device for lubricating the profiled tubes of a telescopic shaft | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4224258A | Method and apparatus for producing spherical particles of uniform size of nuclear fuels or breeder materials | Performing Operations; Transporting | 6 | Expired |
| US4414309A | Photographic recording material containing an aldehyde remover | Physics | 6 | Expired |
| US4430030A | Operating process for the formation of a steady particle stream of particles conveyed within a flow conduit by a flow medium and arrangement for effectuation of the process | Performing Operations; Transporting | 6 | Expired |
| US5981160A | Color photographic silver halide material | Physics | 6 | Expired |
| US4953411A | Angular bevel gear drive for agricultural implements | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4710454A | Photographic recording material and a process for the production of photographic images | Physics | 5 | Expired |
| US4236299A | Method and device for winding spiral fins onto oval tubing | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4756998A | Polymeric couplers and light-sensitive photographic silver halide recording material containing such couplers | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.