Oscar Zerk
Aug 09, 2019
2 minutes
BY DAVID CONWILL
IMAGE COURTESY OF THE
U.S. PATENT AND TRADEMARK OFFICE
on your old car, you’ve used a grease gun to pump highly viscous petroleum lubricant into the various joints and bearings of the chassis and drivetrain — maybe even some of the hinge points in the body. Equally likely, you think of the fittings where the grease gun attaches as “Zerk
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