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Class Information
Number: 164/248
Name: Metal founding > Means to shape a forming surface > Pattern > To produce undercut > Loose piece type
Description: Apparatus wherein the pattern is composed of at least two parts which are relatively separable.

Patents under this class:

Patent Number Title Of Patent Date Issued
4294303 Sand core pattern and method of forming a sand mold Oct. 13, 1981
4150713 Flexible pattern to be used for casting molds Apr. 24, 1979

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