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Application filed by Cecil Allen, Robert AllenfiledCriticalCecil Allen
Application grantedgrantedCritical
Publication of DK29871CpublicationCriticalpatent/DK29871C/en
DK29871D1920-12-101920-12-10
Apparatus for placing piston rings and the like in and removing them from their grooves in the piston in question.
DK29871C
(en)