Werner Frank
19Patents
8h-index
20Co-inventors
72Inventor score
Filing activity: Mar 25, 1977 → Dec 5, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4077620A | Apparatus for the successive release of items of mail from a stack | Physics | 38 | Expired |
| US4302000A | Apparatus for separating a letter stack | Performing Operations; Transporting | 31 | Expired |
| US4522634A | Method and apparatus for automatic regulation of the operation of an electrostatic filter | Performing Operations; Transporting | 30 | Expired |
| US5957448A | Device and process for intermediate stacking of items | Performing Operations; Transporting | 30 | Expired |
| US6004376A | Method for the electrical charging and separation of particles that are difficult to separate from a gas flow | Performing Operations; Transporting | 29 | Expired |
| US5449166A | Apparatus for reversing the direction of flat items | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4634111A | Friction separation device | Performing Operations; Transporting | 13 | Expired |
| US4657241A | Distribution line for flat objects and particularly for letters | Performing Operations; Transporting | 8 | Expired |
| US5923801A | Optical branching element | Physics | 5 | Expired |
| US6527985B1 | Method for producing gradient index refraction index profiles in polymer optical fibers | Physics | 4 | Expired |
| US5353903A | Transfer bridge for letter sorting systems | Performing Operations; Transporting | 4 | Expired |
| US4691913A | Separating apparatus for flat objects | Performing Operations; Transporting | 3 | Expired |
| US8002876B2 | Method and apparatus for electrostatically charging and separating particles that are difficult to separate | Performing Operations; Transporting | 3 | Active |
| US5472310A | Separating device | Performing Operations; Transporting | 2 | Expired |
| US4718575A | Apparatus for ascertaining the level of flowable material in dust separators and the like | Physics | 2 | Expired |
| US5941521A | Device for radially deflecting consignments in transport plants | Performing Operations; Transporting | 1 | Expired |
| US6941048B2 | Optical fiber transmission link having passive, directionally dependent attenuation | Physics | 0 | Expired |
| US9606560B2 | Computer system, arrangement for remote maintenance and remote maintenance method | Emerging Cross-Sectional Technologies | 0 | Active |
| US5584649A | Separating device | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.