GB8720497D0 - Optical mark detector - Google Patents

Optical mark detector

Info

Publication number
GB8720497D0
GB8720497D0 GB878720497A GB8720497A GB8720497D0 GB 8720497 D0 GB8720497 D0 GB 8720497D0 GB 878720497 A GB878720497 A GB 878720497A GB 8720497 A GB8720497 A GB 8720497A GB 8720497 D0 GB8720497 D0 GB 8720497D0
Authority
GB
United Kingdom
Prior art keywords
optical mark
mark detector
detector
optical
mark
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB878720497A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB878720497A priority Critical patent/GB8720497D0/en
Publication of GB8720497D0 publication Critical patent/GB8720497D0/en
Priority to PCT/GB1988/000697 priority patent/WO1989002133A1/en
Pending legal-status Critical Current

Links

GB878720497A 1987-08-29 1987-08-29 Optical mark detector Pending GB8720497D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB878720497A GB8720497D0 (en) 1987-08-29 1987-08-29 Optical mark detector
PCT/GB1988/000697 WO1989002133A1 (en) 1987-08-29 1988-08-24 Optical mark detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878720497A GB8720497D0 (en) 1987-08-29 1987-08-29 Optical mark detector

Publications (1)

Publication Number Publication Date
GB8720497D0 true GB8720497D0 (en) 1987-10-07

Family

ID=10623080

Family Applications (1)

Application Number Title Priority Date Filing Date
GB878720497A Pending GB8720497D0 (en) 1987-08-29 1987-08-29 Optical mark detector

Country Status (2)

Country Link
GB (1) GB8720497D0 (en)
WO (1) WO1989002133A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609305A (en) * 1969-10-29 1971-09-28 Bridge Data Products Inc Card reader
US3684868A (en) * 1970-10-29 1972-08-15 Ncr Co Color bar code tag reader with light-emitting diodes
US3737629A (en) * 1971-06-09 1973-06-05 Addressograph Multigraph Optical code reader
US3786238A (en) * 1972-09-05 1974-01-15 Addressograph Multigraph Optical reader
US4019065A (en) * 1975-12-24 1977-04-19 International Business Machines Corporation Multiplexing document card reader with convex lens
US4020327A (en) * 1976-01-30 1977-04-26 Bell Telephone Laboratories, Incorporated Apparatus for reading optical codes

Also Published As

Publication number Publication date
WO1989002133A1 (en) 1989-03-09

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