CA409720A - Methode et appareil a perforer - Google Patents

Methode et appareil a perforer

Info

Publication number
CA409720A
CA409720A CA409720A CA409720DA CA409720A CA 409720 A CA409720 A CA 409720A CA 409720 A CA409720 A CA 409720A CA 409720D A CA409720D A CA 409720DA CA 409720 A CA409720 A CA 409720A
Authority
CA
Canada
Prior art keywords
perforating method
perforating
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
CA409720A
Other languages
English (en)
Inventor
Jermain Chandler Frank
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 CA409720A publication Critical patent/CA409720A/fr
Expired legal-status Critical Current

Links

CA409720A Methode et appareil a perforer Expired CA409720A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA409720T

Publications (1)

Publication Number Publication Date
CA409720A true CA409720A (fr) 1943-01-05

Family

ID=35421022

Family Applications (1)

Application Number Title Priority Date Filing Date
CA409720A Expired CA409720A (fr) Methode et appareil a perforer

Country Status (1)

Country Link
CA (1) CA409720A (fr)

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