CA424643A - Perforating apparatus - Google Patents

Perforating apparatus

Info

Publication number
CA424643A
CA424643A CA424643A CA424643DA CA424643A CA 424643 A CA424643 A CA 424643A CA 424643 A CA424643 A CA 424643A CA 424643D A CA424643D A CA 424643DA CA 424643 A CA424643 A CA 424643A
Authority
CA
Canada
Prior art keywords
perforating apparatus
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
CA424643A
Other languages
French (fr)
Inventor
P. Haegele Otto
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.)
Canadian Gypsum Co Ltd
United States Gypsum Co
Original Assignee
Canadian Gypsum Co Ltd
United States Gypsum Co
Publication date
Application granted granted Critical
Publication of CA424643A publication Critical patent/CA424643A/en
Expired legal-status Critical Current

Links

CA424643A Perforating apparatus Expired CA424643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA424643T

Publications (1)

Publication Number Publication Date
CA424643A true CA424643A (en) 1944-12-26

Family

ID=35535658

Family Applications (1)

Application Number Title Priority Date Filing Date
CA424643A Expired CA424643A (en) Perforating apparatus

Country Status (1)

Country Link
CA (1) CA424643A (en)

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