US4012735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual mode pattern generator
Assignee: SYSTEMS RESOURCES CORP
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Filing: 1975-10-24
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Granted: 1977-03-15
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Expires: 1995-10-24
Abstract
Abstract In a cathode ray tube display system, characters are generated for display either as matrices of dots or as sets of strokes on the lines of a parallel horizontal line raster.
Inventors
- 👤 James M. Keane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:00
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/22; G09G5/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
In a display system, the method of representing the characters of a font by representing some of the characters of the font by matrix arrays of dots wherein each row of the matrix is stored as a combination of bits in one-to-one correspondence with the presence of dots in the row of the matrix and representing other characters of the font by sets of strokes disposed on a group of parallel lines wherein the length of each stroke is stored as a number in the form of a coded combination of bits.
Claim 2
Dependent Claim
92 words
In a display system, the method of representing the characters of a font by representing some of the characters of the font by matrix arrays of dots wherein each row of the matrix is stored as a combination of bits in one-to-one correspondence with the presence of dots in the row of the matrix and representing other characters of the font by sets of strokes disposed on a group of parallel lines wherein the length of each stroke is stored as a number in the form of a coded combination of bits.
Claim 3
Dependent Claim
31 words
The method of claim 1 of assigning to each character indicium indicating whether the character is represented by a matrix array of dots or a set of a plurality of strokes.
References Cited (Backward Citations)
US2987715A
Cited
US3109166A
Cited
US3471848A
Cited
US3624632A
Cited
US3750135A
Cited
US3979742A
Cited
US3946365A
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |