CA318241A - Grade locking device - Google Patents

Grade locking device

Info

Publication number
CA318241A
CA318241A CA318241A CA318241DA CA318241A CA 318241 A CA318241 A CA 318241A CA 318241 A CA318241 A CA 318241A CA 318241D A CA318241D A CA 318241DA CA 318241 A CA318241 A CA 318241A
Authority
CA
Canada
Prior art keywords
locking device
grade locking
grade
locking
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
CA318241A
Other languages
French (fr)
Inventor
B. Williams John
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 CA318241A publication Critical patent/CA318241A/en
Expired legal-status Critical Current

Links

CA318241A Grade locking device Expired CA318241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA318241T

Publications (1)

Publication Number Publication Date
CA318241A true CA318241A (en) 1931-12-22

Family

ID=35278797

Family Applications (1)

Application Number Title Priority Date Filing Date
CA318241A Expired CA318241A (en) Grade locking device

Country Status (1)

Country Link
CA (1) CA318241A (en)

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