Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1988-04-21
1989-07-25
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Assembling or joining
29558, B21D 3903
Patent
active
048500933
ABSTRACT:
A titanium face plate is perforated by laser drilling holes therethrough. A cellular core is positioned between a sound reflecting solid back plate and the face plate.
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Geib Richard G.
Goldberg Howard N.
Grumman Aerospace Corporation
Hoffman Bernard S.
Rawlins Andrew E.
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