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.)
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HH Robertson Co
Original Assignee
HH Robertson Co
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Filing date
Publication date
Application filed by HH Robertson CofiledCriticalHH Robertson Co
Application grantedgrantedCritical
Publication of FR814071ApublicationCriticalpatent/FR814071A/fr
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR814071D1936-11-061936-11-06Perfectionnements aux procédés et appareils pour la production d'éléments de construction métalliques celluaires
ExpiredFR814071A
(fr)