CA697382A - Blackboard mobile parallel rule - Google Patents

Blackboard mobile parallel rule

Info

Publication number
CA697382A
CA697382A CA697382A CA697382DA CA697382A CA 697382 A CA697382 A CA 697382A CA 697382 A CA697382 A CA 697382A CA 697382D A CA697382D A CA 697382DA CA 697382 A CA697382 A CA 697382A
Authority
CA
Canada
Prior art keywords
parallel rule
mobile parallel
blackboard
blackboard mobile
rule
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.)
Expired
Application number
CA697382A
Inventor
A. Pearce Robert
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
Publication date
Application granted granted Critical
Publication of CA697382A publication Critical patent/CA697382A/en
Expired legal-status Critical Current

Links

CA697382A Blackboard mobile parallel rule Expired CA697382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA697382T

Publications (1)

Publication Number Publication Date
CA697382A true CA697382A (en) 1964-11-10

Family

ID=36007647

Family Applications (1)

Application Number Title Priority Date Filing Date
CA697382A Expired CA697382A (en) Blackboard mobile parallel rule

Country Status (1)

Country Link
CA (1) CA697382A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751809A (en) * 1971-05-06 1973-08-14 W Burgess Portable drafting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751809A (en) * 1971-05-06 1973-08-14 W Burgess Portable drafting apparatus

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