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Priority claimed from US440759Aexternal-prioritypatent/US3401252A/en
Priority claimed from US479031Aexternal-prioritypatent/US3325622A/en
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Publication of BE678023ApublicationCriticalpatent/BE678023A/xx
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM