Videocolor
53Patents
0Active
53Granted
33Portfolio score
Filing activity: Sep 9, 1982 → Apr 1, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4707093A | Method and device for illuminating the face plate of a color television tube for formation of the screen | Electricity | 29 | Expired |
| US4678963A | Shadow mask for a colored image tube and image tube comprising the same | Electricity | 23 | Expired |
| US4635095A | Method for measuring the convergence of a three-gun shadow-mask cathode-ray tube and a device for the application of said method | Electricity | 21 | Expired |
| US4985658A | Front panel for color television tubes | Electricity | 18 | Expired |
| US4925420A | Method for the automatic measurement of convergence and for the determination of corrections to be made in trichromatic cathode tube deflectors and machine for the application of this method | Electricity | 11 | Expired |
| US4714497A | Process for the preparation of ferrous parts of a color television tube and furnace for operating such a process | Electricity | 11 | Expired |
| US4990366A | Method for the metallization of a luminescent screen | Electricity | 9 | Expired |
| US4940920A | Device to shield mask cathode tubes from the earth's magnetic field | Electricity | 8 | Expired |
| US4641062A | Method and apparatus for adjusting the static convergence and purity of color television tubes | Electricity | 8 | Expired |
| US4638211A | Shadow mask for a color image tube and image tube comprising the same | Electricity | 8 | Expired |
| US4812706A | Device for correcting the deflection effect due to a variation of the focusing voltage in a trichromatic cathode ray tube with in line cathodes | Electricity | 7 | Expired |
| US4954366A | Method for the metallization of a luminescent screen | Electricity | 7 | Expired |
| US5306982A | Field harmonic enhancer in a deflection yoke | Electricity | 7 | Expired |
| US4590092A | Aluminization process of the internal face of the screen of a color television tube | Electricity | 7 | Expired |
| US5178906A | Method of manufacturing a phosphor screen for a CRT using an adhesion-promoting, blister-preventing solution | Electricity | 6 | Expired |
| US4896071A | Method and device for setting the static convergence and/or purity of a color television tube | Electricity | 6 | Expired |
| US4776103A | Device for automatic simultaneous controlling of the distance between cathodes and the second grid of a trichromatic cathode tube gun | Electricity | 6 | Expired |
| US4887988A | Method for the mounting of a shadow mask in a trichromatic cathode tube and cathode tube comprising a shadow mask mounted according to this method | Electricity | 5 | Expired |
| US4638219A | Apparatus for adjusting the position of a deflector on a television tube, particularly a color tube | Electricity | 5 | Expired |
| US4968082A | Method for the automatic gripping of objects, enabling the preservation of at least one reference element related to it, and grip to implement said method | Performing Operations; Transporting | 5 | Expired |
| US4636694A | Process and apparatus for the rapid adjustment of the static convergence and purity in a television tube, by using a permanent magnet | Electricity | 5 | Expired |
| US4604071A | Process for aligning and centering an assembly of electron-guns on a color television tube and device for carrying out the process | Electricity | 5 | Expired |
| US5465026A | Deflection yoke with a core extension | Electricity | 4 | Expired |
| US4846746A | Method for the manufacture of vacuum tubes stems | Electricity | 4 | Expired |
| US5108858A | Method for making a viewing screen structure for CRT | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.