OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES
237Patents
83Active
237Granted
48Portfolio score
Filing activity: Oct 9, 1970 → Jan 30, 2023 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4463553A | Turbojet with contrarotating wheels | Mechanical Engineering; Lighting; Heating | 105 | Expired |
| US4446424A | Surface resistivimeter | Physics | 74 | Expired |
| US4706902A | Active method and installation for the reduction of buffeting of the wings of an aircraft | Emerging Cross-Sectional Technologies | 68 | Expired |
| US5603771A | Chemical vapor deposition apparatus activated by a microwave plasma | Chemistry; Metallurgy | 66 | Expired |
| US4583404A | Electrostatic accelerometer | Physics | 62 | Expired |
| US5086274A | Variable frequency magnetic field device employing multiple antennae for measuring the surface impedance of a material | Physics | 48 | Expired |
| US4880355A | Blade with curved end for a rotary airfoil of an aircraft | Performing Operations; Transporting | 47 | Expired |
| US3993414A | Supersonic compressors | Emerging Cross-Sectional Technologies | 45 | Expired |
| US6031482A | Method and system for sensing and locating a person, e.g. under an avalanche | Physics | 42 | Expired |
| US4934103A | Machine for ultrasonic abrasion machining | Performing Operations; Transporting | 41 | Expired |
| US4096296A | Process for forming surface diffusion alloy layers on refractory metallic articles | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5504466A | Suspended dielectric and microstrip type microwave phase shifter and application to lobe scanning antenne networks | Electricity | 35 | Expired |
| US4435190A | Method for separating particles in suspension in a gas | Performing Operations; Transporting | 32 | Expired |
| US4544382A | Apparatus for separating particles in suspension in a gas | Performing Operations; Transporting | 31 | Expired |
| US3931374A | Processes for the manufacture of fuel blocks containing a metallic powder and in the corresponding blocks | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4417293A | Methods and apparatus for transferring electric charges of different signs into a space zone, and application to static electricity eliminators | Electricity | 28 | Expired |
| US4316791A | Device for chemical dry etching of integrated circuits | Electricity | 26 | Expired |
| US4445816A | Supersonic compressor with improved operation range | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4416434A | Blade section for rotating wings of an aircraft | Performing Operations; Transporting | 25 | Expired |
| US5239653A | Switching device for balancing load in communication network based on source and destination load information and internal load information | Electricity | 24 | Expired |
| US5537118A | Method for tracking moving objects | Physics | 24 | Expired |
| US4302709A | Vibrating device with motionless frame | Physics | 23 | Expired |
| US4773825A | Air propellers in so far as the profile of their blades is concerned | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4563125A | Ceramic blades for turbomachines | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4652213A | Propeller blade for aircraft propulsion | Emerging Cross-Sectional Technologies | 22 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.