US3588827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable linear matrix
Assignee: US Philips Corp
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Filing: 1968-11-29
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Granted: 1971-06-28
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Expires: 1988-11-29
Abstract
Abstract A VARIABLE LINEAR MATRIC CIRCUIT FOR A PLURALITY OF SIGNALS, SUCH AS THE THREE COLOR SIGNALS IN A COLOR TELEVISION CAMERA, IS COMPRISED OF A FIRST FIXED MATRIX, A VARIABLE MATRIX, AND A SECOND FIXED MATRIX, CONNECTED IN THAT ORDER. THE COEFFICIENTS OF THE MATRICES ARE SELECTED TO MINIMIZE THE NUMBER OF VARIABLES IN THE VARIABLE MATRIX. FOR EXAMPLE, IN A COLOR TELEVISION CAMERA SYSTEM HAVING THREE COLOR SIGNALS, THE NUMBER OF VARIABLES TO BE CONTROLLED IN THE MATRIX MAY BE REDUCED TO FOUR.
Inventors
- 👤 Frederik Johannes Van Roessel
- 👤 Jan August Marcel Hofman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:31
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |