EMI, LLC
271Patents
0Active
271Granted
42Portfolio score
Filing activity: Jan 22, 1965 → Oct 30, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4038596A | Method and apparatus for authenticating a record medium consisting of applying two different strength magnetizing fields and monitoring the remanent fields | Physics | 124 | Expired |
| US4754493A | Automatic recognition and guidance arrangements | Physics | 122 | Expired |
| US4517679A | Communication over noisy lines | Electricity | 66 | Expired |
| US4244998A | Patterned layers including magnetizable material | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4118631A | Radiographic apparatus | Human Necessities | 59 | Expired |
| US4002917A | Sources of X-radiation | Human Necessities | 57 | Expired |
| US4629957A | Sensing apparatus | Physics | 57 | Expired |
| US4297729A | Encoding and decoding of digital recordings | Physics | 52 | Expired |
| US4435266A | Electroplating arrangements | Chemistry; Metallurgy | 51 | Expired |
| US3952201A | Radiography | Human Necessities | 50 | Expired |
| US4181856A | Arrangements for detectors of radiation | Physics | 50 | Expired |
| US4333053A | Imaging systems | Physics | 48 | Expired |
| US3946234A | Apparatus for examining bodies by means of penetrating radiation | Physics | 47 | Expired |
| US3973128A | Tomography | Electricity | 46 | Expired |
| US3944833A | Apparatus for examining a body by radiation such as X or gamma radiation | Physics | 46 | Expired |
| US4010370A | Computerized tomography apparatus with means to periodically displace radiation source | Human Necessities | 44 | Expired |
| US4034224A | Patient positioning and supporting arrangement | Human Necessities | 43 | Expired |
| US4031395A | Radiography | Human Necessities | 42 | Expired |
| US3998160A | Magnetic ink printing method | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4257272A | Ultrasonic apparatus | Human Necessities | 40 | Expired |
| US4164728A | Correlation techniques | Physics | 38 | Expired |
| US4862176A | Identification of friend or foe (IFF) systems | Physics | 36 | Expired |
| US4010409A | Automatic vehicle guidance systems | Physics | 35 | Expired |
| US4284950A | Imaging systems | Physics | 34 | Expired |
| US4180207A | Security material and secure document system using said material | Performing Operations; Transporting | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.