Central Research Laboratories Limited
74Patents
0Active
74Granted
39Portfolio score
Filing activity: Oct 19, 1973 → Jul 5, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6181802A | Method and apparatus for coding information by inserting codes in strongly featured image regions | Electricity | 115 | Expired |
| US6128054A | Apparatus for displaying an image | Electricity | 84 | Expired |
| US6498857B1 | Method of synthesizing an audio signal | Electricity | 72 | Expired |
| US5464476A | Plasma processing device comprising plural RF inductive coils | Electricity | 70 | Expired |
| US4221516A | Master-slave manipulator | Performing Operations; Transporting | 69 | Expired |
| US6680767B2 | Method of forming a liquid crystal polymer layer without support substrate | Chemistry; Metallurgy | 57 | Expired |
| US6046898A | Apparatus for blocking a D.C. component of a signal | Electricity | 55 | Expired |
| US6131386A | Single mode resonant cavity | Emerging Cross-Sectional Technologies | 53 | Expired |
| US6577736B1 | Method of synthesizing a three dimensional sound-field | Electricity | 46 | Expired |
| US5412463A | Finger guide with orthogonal guide surfaces | Physics | 44 | Expired |
| US5514127A | Apparatus for irradiating an area with a controllable pattern of light | Human Necessities | 41 | Expired |
| US6454923B1 | Gas sensor | Physics | 38 | Expired |
| US5914019A | Gas sensor | Physics | 35 | Expired |
| US4141609A | System for effecting access into sealed enclosures | Physics | 30 | Expired |
| US5666425A | Plural-channel sound processing | Electricity | 26 | Expired |
| US6179211A | Method of identifying a data carrier | Physics | 25 | Expired |
| US6338037B1 | Audio signal identification using code labels inserted in the audio signal | Electricity | 24 | Expired |
| US5726806A | Apparatus for displaying a plurality of viewable images of an object | Physics | 23 | Expired |
| US4010588A | Sealing device | Performing Operations; Transporting | 22 | Expired |
| US5861993A | Apparatus for displaying an image | Physics | 21 | Expired |
| US6290791A | Method of making a fluid connection | Physics | 21 | Expired |
| US5961832A | Method and apparatus for diffusive transfer between immiscible fluids | Physics | 20 | Expired |
| US6558519B1 | Gas sensors | Physics | 18 | Expired |
| US6402782B1 | Artificial ear and auditory canal system and means of manufacturing the same | Electricity | 18 | Expired |
| US6643375B1 | Method of processing a plural channel audio signal | Electricity | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.