Inventor
COVEY ROBERT A
US4 patents
Patents
4 patentsUS9830836B1Nov 28, 2017
Flexible drive shaft for greeting cards and the like
HALLMARK CARDS7 citations81
US10089904B2Oct 2, 2018
Flexible drive shaft for greeting cards and the like
HALLMARK CARDS8 citations78
US11004361B2May 11, 2021
Flexible drive shaft for greeting cards and the like
HALLMARK CARDS0 citations60
US10515568B2Dec 24, 2019
Flexible drive shaft for greeting cards and the like
HALLMARK CARDS0 citations49