Gerhard Stenzel
57Patents
22h-index
28Co-inventors
88Inventor score
Filing activity: Oct 4, 1976 → May 23, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7117231B2 | Method and system for the automatic generation of multi-lingual synchronized sub-titles for audiovisual data | Emerging Cross-Sectional Technologies | 215 | Expired |
| US4892336A | Antifalsification document having a security thread embedded therein and a method for producing the same | Performing Operations; Transporting | 117 | Expired |
| US4451521A | Security paper with authenticity features in the form of substances luminescing only in the invisible region of the optical spectrum and process for testing the same | Emerging Cross-Sectional Technologies | 108 | Expired |
| US4756557A | Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document | Emerging Cross-Sectional Technologies | 88 | Expired |
| US5801857A | Data carrier having an optically variable element and methods for producing it | Emerging Cross-Sectional Technologies | 81 | Expired |
| US4452843A | Security paper | Emerging Cross-Sectional Technologies | 67 | Expired |
| US4146792A | Paper secured against forgery and device for checking the authenticity of such papers | Physics | 63 | Expired |
| US4451530A | Security paper with authenticity features in the form of luminescing substances | Emerging Cross-Sectional Technologies | 60 | Expired |
| US6337752B1 | Data carrier having an optically variable element and methods for producing it | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4598205A | Security paper with authenticity features in the form of substances luminescing only in the invisible region of the optical spectrum and process for testing the same | Emerging Cross-Sectional Technologies | 52 | Expired |
| US4988126A | Document with an unforgeable surface | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4591707A | Printed security with hallmarks | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4157784A | Safeguard against falsification of securities and the like which is suitable for automatic machines | Physics | 46 | Expired |
| US4442170A | Security document with security features in the form of luminescing substances | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5433807A | Method of producing a document with an unforgeable surface relief | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4533244A | Process for authenticity determination of security documents with security features in the form of luminescing substances | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6344261B1 | Printed document having a value and comprising a luminescent authenticity feature based on a host lattice | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6799158B2 | Method and system for generating a characteristic identifier for digital data and for detecting identical digital data | Physics | 30 | Expired |
| US6954293B2 | Data carrier having an optically variable element and methods for producing it | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5483602A | Method and apparatus for detecting printed images on documents by testing for the presence in the images of structural elements having defined regularities which are recognizable by the eye and common to a variety of documents | Physics | 28 | Expired |
| US6506476B1 | Printed document having a value, with luminescent authenticity feature | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5055032A | A burner with a flame retention device | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5112672A | Security document having an electrically conductive security element embedded therein | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4446204A | Security paper with authenticity features | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4463970A | Security paper having camouflage materials to protect its authenticity features | Emerging Cross-Sectional Technologies | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.