Patent US960260A successfully refreshed from Google Patents.
US4247902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display for electronic calculator
Assignee: Canon Inc
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Filing: 1979-03-08
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Granted: 1981-01-27
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Expires: 1999-03-08
Abstract
Abstract A display device for use in electronic calculators capable of displaying determinants. The display device is able to display data of positions in row and in column of elements in a determinant together with numbers associated with the elements. The data of positions in row and column is displayed as selective segments of a figure "8" pattern.
Inventors
- 👤 Ichiro Sado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:44
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; B; B65; B65C; B65C2210/00; B65C2210/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A display device for use in electronic calculators comprising: first display means for displaying numerical data of a determinant; and second display means for displaying data of a position in row and in column of the determinant associated with the numerical data.
Claim 2
Dependent Claim
42 words
A display device for use in electronic calculators comprising: first display means for displaying numerical data of a determinant; and second display means for displaying data of a position in row and in column of the determinant associated with the numerical data.
Claim 3
Dependent Claim
52 words
A display device in accordance with claim 1, wherein each of said first and second display means comprises a group electrodes which are disposed as a pattern of the figure "8", said electrodes being selectively energized to display the numerical data of a determinant and the data of a position associated therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |