US3877155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Responsive answer system
Assignee: Xerox Corp
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Filing: 1967-06-26
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Granted: 1975-04-15
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Expires: 1987-06-26
Abstract
Abstract Permanent, meaningful information is so associated with removable, confusing information, at least some of which is usually similar in character to said permanent, meaningful information, as to make it effectively impossible for an observer to discriminate between the two types of information even though both types of information in the association may be legible. Such a system is advantageously used in instructional systems and particularly in responsive answer formats.
Inventors
- 👤 Stephen F Royka
- 👤 Robert G Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G06; G06K; G06K17/00; G06K17/0032; G09; G09B; G09B3/00; G09B3/06; G09B3/08; G09B3/085
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A device for selectively indicating information comprising a support having response areas for presenting information for selection, permanent printing indicative of meaningful information permanently fixed to said support within a response area, and removable printing indicative of confusing information removably fixed to said support within a response area, said meaningful and confusing information being substantially legible even when said permanent and removable printing are fixed over one another on said support, said permanent and removable printing being substantially similar such that an observer cannot determine which information is permanent and which is removable whereby the information within a response area is selected by attempting to remove the printing therein with the failure to remove printing identifying meaningful information.
Claim 2
Independent Claim
118 words
A device for selectively indicating information comprising a support having response areas for presenting information for selection, permanent printing indicative of meaningful information permanently fixed to said support within a response area, and removable printing indicative of confusing information removably fixed to said support within a response area, said meaningful and confusing information being substantially legible even when said permanent and removable printing are fixed over one another on said support, said permanent and removable printing being substantially similar such that an observer cannot determine which information is permanent and which is removable whereby the information within a response area is selected by attempting to remove the printing therein with the failure to remove printing identifying meaningful information.
Claim 3
Dependent Claim
34 words
The device of claim 1 further including overlay printing removably fixed to said support over said permanent and removable printing to obscure that the meaningful information is permanent and the confusing information is removable.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein each response area includes both permanent and removable printing.
Claim 5
Dependent Claim
15 words
The device of claim 1 wherein said removable printing is abradably removable from said support.
Claim 6
Dependent Claim
16 words
The device of claim 1 wherein at least said removable printing includes a xerographic toner material.
Claim 7
Dependent Claim
28 words
The device of claim 5 wherein said xerographic toner material is fixed to said support by greater than a class 1 but Less than a class 3 fix.
Claim 8
Dependent Claim
60 words
The device of claim 1 wherein a response area represents an answer to a question with meaningful information within the response area indicating whether the response area represents a correct or incorrect answer to the question and with confusing information within the same response area falsely indicating whether the response area represents a correct or incorrect answer to the question
Claim 9
Dependent Claim
56 words
The device of claim 1 wherein a response area includes information indicative of a human face having frown and grin portions with said permanent printing indicating either the grin or frown portion depending upon which constitutes meaningful information and with said removable printing indicating either the grin or frown portion depending upon which constitutes confusing information.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |