US3618019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signature identification by means of pressure patterns
Assignee: Conversational Systems Corp
•
Filing: 1969-11-13
•
Granted: 1971-11-02
•
Expires: 1989-11-13
Abstract
Abstract A system verifies signatures by converting the pressure patterns generated when a person writes his signature to binary coded combinations of signals which are then compared for similarity with previously recorded binary coded combinations of signals representing known signatures.
Inventors
- 👤 Samuel M Nemirovsky
- 👤 Jacob Sternberg
- 👤 George Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
G; G06; G06V; G06V40/00; G06V40/30; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/35
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
The method of verifying the signature of a person comprising the steps of measuring the pressure between a writing instrument and a writing surface when the person is writing his signature, integrating the instantaneous pressure with respect to time over the period during which the signature is being written by the person to obtain a first indicium, measuring the instantaneous peak pressure occurring during the writing of said signature to obtain a second indicium, and sensing for the time of occurrence of said instantaneous peak pressure with respect to the start of the writing of said signature to obtain a third indicium, and comparing said indicia with prerecorded values of such indicia.
Claim 2
Independent Claim
112 words
The method of verifying the signature of a person comprising the steps of measuring the pressure between a writing instrument and a writing surface when the person is writing his signature, integrating the instantaneous pressure with respect to time over the period during which the signature is being written by the person to obtain a first indicium, measuring the instantaneous peak pressure occurring during the writing of said signature to obtain a second indicium, and sensing for the time of occurrence of said instantaneous peak pressure with respect to the start of the writing of said signature to obtain a third indicium, and comparing said indicia with prerecorded values of such indicia.
Claim 3
Dependent Claim
43 words
The method of claim 11 further comprising the step of converting the obtained first, second and third indicia to a first coded combination of bits and wherein said prerecorded values of such indicia are represented by a corresponding second coded combination of bits.
Claim 4
Dependent Claim
43 words
The method of claim 2 further comprising the step of confirming the validity of the signature of the person when there is an equality between at least a given first number of corresponding bits of said first and second coded combinations of bits.
Claim 5
Dependent Claim
43 words
The method of claim 3 further comprising the step of rejecting the validity of the signature of the person when there is an equality between less than a given second number of corresponding bits of said first and second coded combinations of bits.
Claim 6
Dependent Claim
50 words
The method of claim 4 further comprising the step of indicating an ambiguity in the validity of the signature of the person when there is an equality of a number of corresponding bits of said first and second coded combinations of bits which is between said first and second numbers.
Claim 7
Dependent Claim
167 words
Signature identifying apparatus comprising transducer means for converting pressure variations between a writing instrument and a writing surface when a signature is being written to an electrical signal, processing means for representing the time integral of said electrical signal as a first indicium, for representing the peak amplitude of the electrical signal as a second indicium and for representing the time of occurrence of said peak amplitude as a third indicium, means for combining said indicia into a first coded combination of binary signals, memory means for storing in a plurality of addressed registers second coded combinations of binary signals, addressing means for generating identifying addresses associated with the addressed registers, comparing means receiving said first coded combination of binary signals and a second coded combination of binary signals from a register of said memory means, as indicated by said addressing means, for comparing the so received coded combinations of binary signals and indicating the degree of similarity between said so received coded combinations of binary signals.
Claim 8
Dependent Claim
167 words
Signature identifying apparatus comprising transducer means for converting pressure variations between a writing instrument and a writing surface when a signature is being written to an electrical signal, processing means for representing the time integral of said electrical signal as a first indicium, for representing the peak amplitude of the electrical signal as a second indicium and for representing the time of occurrence of said peak amplitude as a third indicium, means for combining said indicia into a first coded combination of binary signals, memory means for storing in a plurality of addressed registers second coded combinations of binary signals, addressing means for generating identifying addresses associated with the addressed registers, comparing means receiving said first coded combination of binary signals and a second coded combination of binary signals from a register of said memory means, as indicated by said addressing means, for comparing the so received coded combinations of binary signals and indicating the degree of similarity between said so received coded combinations of binary signals.
Claim 9
Dependent Claim
97 words
The identifying apparatus of claim 6 wherein said comparing means generates one of the following indications: substantial equality, inequality and ambiguity for each comparison. 8, The identifying apparatus of claim 7 wherein said transducer means is remote from said memory means and said transducer means is remote from said memory means and said comparing means, and further comprising indicator means in proximity with said transducer means, means connected to said comparing means for generating indication signals in accordance with the indications generated by said comparing means, and means for transmitting said indication signals to said indicator means.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |