US4346450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic calculator having item count display
Assignee: Canon Inc
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Filing: 1980-02-21
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Granted: 1982-08-24
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Expires: 2000-02-21
Abstract
Abstract The present invention provides an electronic apparatus for providing plural information, capable of displaying, while the addition or subtraction key is depressed, the item count indicating the number of actuations of the addition or subtraction key, and displaying the result of calculation obtained up to such key actuation when the key is released from the depressed state.
Inventors
- 👤 Shigeru Matsuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:02
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/025; G06F3/00; G06F3/14; G06F3/1407; G06F3/147
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
An electronic apparatus for providing plural information, comprising: calculation instruction means for generating calculation instructions; first memory means connected to said calculation instruction means for memorizing a number corresponding to the number of operations of said calculation instruction means; data input means for entering data; processor means connected to said calculation instruction means and to said data input means for operating on said entered data in accordance with said calculation instructions to produce a calculation result; second memory means connected to said processor means for memorizing said calculation result; and output means connected to said first memory means, to said second memory means and to said calculation instruction means for outputting the content of said first memory means in one drive mode of said calculation instruction means and the content of said second memory means in another drive mode of said calculation instruction means.
Claim 2
Dependent Claim
144 words
An electronic apparatus for providing plural information, comprising: calculation instruction means for generating calculation instructions; first memory means connected to said calculation instruction means for memorizing a number corresponding to the number of operations of said calculation instruction means; data input means for entering data; processor means connected to said calculation instruction means and to said data input means for operating on said entered data in accordance with said calculation instructions to produce a calculation result; second memory means connected to said processor means for memorizing said calculation result; and output means connected to said first memory means, to said second memory means and to said calculation instruction means for outputting the content of said first memory means in one drive mode of said calculation instruction means and the content of said second memory means in another drive mode of said calculation instruction means.
Claim 3
Dependent Claim
23 words
An electronic apparatus according to the claim 1, wherein said calculation instruction means at least comprises addition instruction means and subtraction instruction means.
Claim 4
Dependent Claim
29 words
An electronic apparatus according to the claim 1, wherein said output means comprises display means for visual display of the output from said first and said second memory means.
Claim 5
Dependent Claim
25 words
An electronic apparatus according to the claim 1, wherein said data input means at least comprises numeral input means for entering numerals 0 to 9.
Claim 6
Dependent Claim
197 words
An electronic apparatus for providing plural information, comprising: data input means for entering data; addition instruction means for instructing the addition of data entered by said data input means; subtraction instrument means for instructing the subtraction of data entered by said data input means; memory means connected to said addition instruction means and to said subtraction instruction means for storing a number corresponding to the number of operations of said addition instruction means and to the number of operations of said subtraction instruction means; processor means connected to said data input means, to said addition instruction means, and to said subtraction instruction means for operating on said entered data in accordance with said addition instruction or said subtraction instruction to produce a calculation result; and output means connected to said processor means and to said memory means for providing the number stored in said memory means in a period between the output of the result of calculation in response to an instruction from said addition instruction means or from said subtraction instruction means and for providing the result of calculation in response to a subsequent instruction from said addition instruction means or from said subtraction instruction means.
Claim 7
Dependent Claim
197 words
An electronic apparatus for providing plural information, comprising: data input means for entering data; addition instruction means for instructing the addition of data entered by said data input means; subtraction instrument means for instructing the subtraction of data entered by said data input means; memory means connected to said addition instruction means and to said subtraction instruction means for storing a number corresponding to the number of operations of said addition instruction means and to the number of operations of said subtraction instruction means; processor means connected to said data input means, to said addition instruction means, and to said subtraction instruction means for operating on said entered data in accordance with said addition instruction or said subtraction instruction to produce a calculation result; and output means connected to said processor means and to said memory means for providing the number stored in said memory means in a period between the output of the result of calculation in response to an instruction from said addition instruction means or from said subtraction instruction means and for providing the result of calculation in response to a subsequent instruction from said addition instruction means or from said subtraction instruction means.
Claim 8
Dependent Claim
56 words
An electronic apparatus according to the claim 5, wherein said output means comprises control means for providing the number stored in said memory means upon initiation of an operation of said addition instruction means or upon initiation of an operation of said subtraction instruction means, and for providing said calculation result upon completion of said operations.
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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |