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3772750
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Information
Patent Grant
3772750
References
Source
Patent Number
3,772,750
Date Filed
Not available
Date Issued
Tuesday, November 20, 1973
50 years ago
CPC
F16C33/32 - Balls
B23K15/04 - for welding annular seams
B23P15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
F16C2226/36 - by welding
Y10T29/49714 - Hollow ball
Y10T29/49893 - Peripheral joining of opposed mirror image parts to form a hollow body
US Classifications
029 - Metal working
219 - Electric heating
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