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Class Information
Number: 384/555
Name: Bearings > Rotary bearing > Antifriction bearing > Radial bearing > Roller bearing > Discrete circumferential or axial spacer > Spaced by rollers > Mating grooves and projections
Description: Subject matter wherein annular grooves or projections on the load-bearing roller skate with annular projections or grooves on the nonload-bearing spacing rollers.

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Patent Number Title Of Patent Date Issued

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