US3598973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table look-up sales tax computer
Assignee: International Business Machines Corp
•
Filing: 1969-01-13
•
Granted: 1971-08-10
•
Expires: 1989-01-13
Abstract
Abstract A computer including a register containing an initially proposed trial value of sales tax for a given actual sales price, a tax matrix to determine the cutoff sales price for that trial tax, a subtractor for determining if the actual sales price is larger than the cutoff sales price, logic elements for repetitively proposing the next higher trial value if the actual sales price is larger, means to use the calculated tax if the actual sales price is not larger, and means to compute the tax as a percentage of the sales price if the highest programmed trial tax is smaller than the actual tax.
Inventors
- 👤 Everett G Brooks
- 👤 Rogert D Kaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:25
CPC Classifications
G; G07; G07G; G07G1/00; G07G1/12; G06; G06Q; G06Q20/00; G06Q20/08; G06Q20/20; G06Q20/207; G06Q40/00; G06Q40/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
318 words
A calculator for calculating the amount of sales tax due under rules which require the tax to incrementally increase each time the amount of a taxable sale exceeds the predetermined upper cutoff value of a lower tax slot, there being a number of contiguous tax slots, each assigned a tax and a cutoff value of amount of taxable sale comprising: a. first means for providing a first signal having the numerical value of the amount of taxable sale, b. second means for providing a second signal having the numerical value of the cutoff value of a chosen one of the tax slots, c. selection means for controlling said second means to cause an initially chosen one of the tax slots to be the slot having the lowest cutoff value, d. indication means responsive to said first and second signals for generating an indication of a first type if the numerical value of the taxable sale represented by said first signal is larger than the numerical value of the cutoff value represented by said second signal and for providing an indication of a second type if the value represented by said first signal is not larger than the value represented by said second signal. e. wherein said selection means is responsive to indications of said first type for causing said second means to step up a slot to provide a second signal having the numerical value of the cutoff value of the tax slot next above the previously chosen tax slot, f. means responsive to an indication of said second type for stopping the stepping of said second means, and g. means responsive to said selection means and to said indication means for providing a numerical indication of the number of times said selection means has been stepped upon the occurrence of an indication of said second type to provide an indication of the amount of sales tax due.
Claim 2
Dependent Claim
318 words
A calculator for calculating the amount of sales tax due under rules which require the tax to incrementally increase each time the amount of a taxable sale exceeds the predetermined upper cutoff value of a lower tax slot, there being a number of contiguous tax slots, each assigned a tax and a cutoff value of amount of taxable sale comprising: a. first means for providing a first signal having the numerical value of the amount of taxable sale, b. second means for providing a second signal having the numerical value of the cutoff value of a chosen one of the tax slots, c. selection means for controlling said second means to cause an initially chosen one of the tax slots to be the slot having the lowest cutoff value, d. indication means responsive to said first and second signals for generating an indication of a first type if the numerical value of the taxable sale represented by said first signal is larger than the numerical value of the cutoff value represented by said second signal and for providing an indication of a second type if the value represented by said first signal is not larger than the value represented by said second signal. e. wherein said selection means is responsive to indications of said first type for causing said second means to step up a slot to provide a second signal having the numerical value of the cutoff value of the tax slot next above the previously chosen tax slot, f. means responsive to an indication of said second type for stopping the stepping of said second means, and g. means responsive to said selection means and to said indication means for providing a numerical indication of the number of times said selection means has been stepped upon the occurrence of an indication of said second type to provide an indication of the amount of sales tax due.
Claim 3
Dependent Claim
45 words
A calculator according to claim 1 further comprising addition means responsive to said indication of the amount of sales tax due and to said first signal for providing an output indication of the total amount of money due for the taxable sale plus sales tax.
Claim 4
Dependent Claim
118 words
A calculator as defined in claim 1 wherein the tax slots are arranged in a plurality of groups, the number of slots in each group being uniform, the difference between cutoff values of corresponding tax slots in adjacent groups being one dollar, and further comprising means responsive to said second means and to said indication means for determining that the upper cutoff value in a group has been reached without the occurrence of an indication of said second type, for increasing the dollar digit of the cutoff values by one and setting the cents digits thereof to zero, and for causing the selection means to step said second means through the corresponding slots of the next higher group.
Claim 5
Dependent Claim
50 words
A calculator according to claim 3 further comprising means responsive to the chOice by said selection means of a cutoff value of a predetermined maximum value and to the absence of an indication of said second type for calculating the sales tax due as a percentage of the taxable sale.
Claim 6
Dependent Claim
107 words
A calculator according to claim 1 wherein said first and second signals represent the respective numerical values of the amount of taxable sale and the cutoff value by the respective digital values of the signals and wherein said indication means further comprises: a. a subtraction means for subtracting the digital value of one of said first and second signals from the digital value of the other of said first and second signals to derive a difference indication, and b. means for detecting the sign of said difference indication for generating said indication of a first type and said indication of a second type according to said sign.
Claim 7
Dependent Claim
52 words
A calculator according to claim 1 wherein said second means provides only one group of second signals representing a corresponding one group of tax slot cutoff values, and in which the stepping of said second means is stopped at the upper cutoff value of said one group if it proceeds so far.
Claim 8
Dependent Claim
50 words
A calculator according to claim 1 further comprising means responsive to the choice by said selection means of a cutoff value of a predetermined maximum value and to the absence of an indication of said second type for calculating the sales tax due as a percentage of the taxable sale.
References Cited (Backward Citations)
US3253132A
Cited
US3294960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |