Michel Ugon
25Patents
22h-index
11Co-inventors
82Inventor score
Filing activity: Aug 25, 1978 → Dec 23, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5479509A | Method for signature of an information processing file, and apparatus for implementing it | Physics | 230 | Expired |
| US5442645A | Method for checking the integrity of a program or data, and apparatus for implementing this method | Physics | 211 | Expired |
| US4211919A | Portable data carrier including a microprocessor | Electricity | 191 | Expired |
| US4825052A | Method and apparatus for certifying services obtained using a portable carrier such as a memory card | Physics | 173 | Expired |
| US5825875A | Process for loading a protected storage zone of an information processing device, and associated device | Physics | 150 | Expired |
| US4264917A | Flat package for integrated circuit devices | Emerging Cross-Sectional Technologies | 139 | Expired |
| US4523297A | Hand-held processor with two-way dialog between microprocessor in case and microprocessor on carrier insertable into casing slot | Physics | 130 | Expired |
| US4450535A | System and method for authorizing access to an article distribution or service acquisition machine | Physics | 121 | Expired |
| US4795893A | Security device prohibiting the function of an electronic data processing unit after a first cutoff of its electrical power | Physics | 115 | Expired |
| US4907272A | Method for authenticating an external authorizing datum by a portable object, such as a memory card | Electricity | 105 | Expired |
| US5566323A | Data processing system including programming voltage inhibitor for an electrically erasable reprogrammable nonvolatile memory | Physics | 100 | Expired |
| US4382279A | Single chip microprocessor with on-chip modifiable memory | Physics | 87 | Expired |
| US4807288A | Microprocessor intended particularly for executing the calculation algorithms of a public code encoding system | Electricity | 77 | Expired |
| US4295041A | Device for the protection of access to a permanent memory of a portable data carrier | Physics | 74 | Expired |
| US4442345A | Apparatus for and method of recycling recording carriers, such as credit cards, including non-volatile erasable memories for identification data | Physics | 65 | Expired |
| US4656342A | Method and apparatus for authorizing the holder of a portable object such as a card to gain access to at least one service provided by at least one authorizing entity | Physics | 57 | Expired |
| US4544833A | Process and apparatus for authenticating or certifying at least one item of information contained in a memory of a removable and portable electronic carrier, such as a card | Electricity | 55 | Expired |
| US5944833A | Integrated circuit and method for decorrelating an instruction sequence of a program | Physics | 52 | Expired |
| US4556958A | Device for single line bidirectional data transmission between an intelligent card's microprocessor and a second processor | Physics | 49 | Expired |
| US6839849B1 | Smart integrated circuit | Physics | 28 | Expired |
| US4538058A | Power supply system of a device designed to cooperate with a removable electronic medium such as a card and device equipped with such a system | Electricity | 26 | Expired |
| US5815083A | Process for entry of a confidential piece of information and associated terminal | Physics | 24 | Expired |
| US5341421A | Security device, including a memory and/or a microcomputer for data processing machines | Physics | 22 | Expired |
| US4591945A | Device for protecting electronic circuits against electrostatic charges | Electricity | 16 | Expired |
| US7036002B1 | System and method for using multiple working memories to improve microprocessor security | Physics | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.