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Class Information
Number: 29/DIG.43
Name: Metal working > Upsetting and flanging tube end

Patents under this class:

Patent Number Title Of Patent Date Issued
6327771 Method of forming a flared-end pipe with a reduced resistance bead seal and method of use Dec. 11, 2001
5363544 Multi-stage dual wall hydroforming Nov. 15, 1994
4705306 Injection line connection Nov. 10, 1987
4503594 Method for fabricating an orifice fitting for a gas pressure differential-measuring system Mar. 12, 1985
4122701 Collar sleeves and process and tool for the manufacture thereof Oct. 31, 1978
4062701 Method of forming end flanges Dec. 13, 1977

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