CA372899A - Methode et appareil a graver - Google Patents

Methode et appareil a graver

Info

Publication number
CA372899A
CA372899A CA372899A CA372899DA CA372899A CA 372899 A CA372899 A CA 372899A CA 372899 A CA372899 A CA 372899A CA 372899D A CA372899D A CA 372899DA CA 372899 A CA372899 A CA 372899A
Authority
CA
Canada
Prior art keywords
etching method
etching
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
CA372899A
Other languages
English (en)
Inventor
Aubrey Marshall Donald
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.)
ETCHED PRODUCTS Inc
Original Assignee
ETCHED PRODUCTS Inc
Publication date
Application granted granted Critical
Publication of CA372899A publication Critical patent/CA372899A/fr
Expired legal-status Critical Current

Links

CA372899A Methode et appareil a graver Expired CA372899A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA372899T

Publications (1)

Publication Number Publication Date
CA372899A true CA372899A (fr) 1938-04-05

Family

ID=35377222

Family Applications (1)

Application Number Title Priority Date Filing Date
CA372899A Expired CA372899A (fr) Methode et appareil a graver

Country Status (1)

Country Link
CA (1) CA372899A (fr)

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