US4172285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key-operated program calculator
Assignee: Sharp Corp
•
Filing: 1977-06-24
•
Granted: 1979-10-23
•
Expires: 1997-06-24
Abstract
Abstract A key-operated digital program calculator is adapted to receive in succession a plurality of different kinds of input data items and perform a specified program calculation thereupon. The calculator is further provided with a display capable of visually displaying which kinds of input data items to be entered thereinto, whereby the operator is visually informed of the kinds of input data items to be next introduced into the calculator.
Inventors
- 👤 Hideo Yoshida
- 👤 Tetsuo Myooi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/025; G01; G01C; G01C21/00; G01C21/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
In a key-operated program calculator adapted to achieve a specific program calculation in response to a plurality of kinds of input data items introduced sequentially thereto, comprising: an input data item display; means for exhibiting various and different types of symbols on said input data display during successive stages of a computation; said exhibiting means further comprising: means for displaying symbols on said input data item display which represent types of data inputs that must be entered for processing during subsequent computations; means for displaying different symbols on said input data display which represents types of data currently being entered for currently performing computations; and means for displaying other different symbols on said input data item display which represent the results of a previously performed computation.
Claim 2
Dependent Claim
126 words
In a key-operated program calculator adapted to achieve a specific program calculation in response to a plurality of kinds of input data items introduced sequentially thereto, comprising: an input data item display; means for exhibiting various and different types of symbols on said input data display during successive stages of a computation; said exhibiting means further comprising: means for displaying symbols on said input data item display which represent types of data inputs that must be entered for processing during subsequent computations; means for displaying different symbols on said input data display which represents types of data currently being entered for currently performing computations; and means for displaying other different symbols on said input data item display which represent the results of a previously performed computation.
Claim 3
Dependent Claim
19 words
The invention as set forth in claim 1 wherein the input data item display is of the segment type.
Claim 4
Dependent Claim
159 words
The invention as set forth in claim 1, wherein said means for exhibiting various and different types of symbols on said data display during successive stages of a computation comprises: a processor; a judgement circuit providing information to and receiving commands from said processor; a shift register region; an adder/subtractor; and a controller; said processor providing electrical signals to said controller and to said judgement circuit, and receiving signal information from said judgement circuit; said judgement circuit providing electrical signals to said controller, said adder/subtractor, and said processor and receiving signal information from said processor; said adder/subtractor supplying electrical signals to said shift register region and receiving signal information from said controller and said judgement circuit; said controller receiving electrical signals from said shift register region, said processor and said judgement circuit and supplying electrical signal information to said adder/subtractor; and said shift register region receiving electrical signals from said adder/subtractor and supplying electrical signals to said controller means.
References Cited (Backward Citations)
US3573442A
Cited
US3783257A
Cited
US3845277A
Cited
US3836690A
Cited
US3860795A
Cited
US3973237A
Cited
US3967098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |