Inventor
WOJTKIEWICZ MARK
US4 patents
Patents
4 patentsUS6877501B2Apr 12, 2005
Ball launching apparatus
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Ball launching apparatus
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US6964634B2Nov 15, 2005
Jumping device with convertible stabilizing base
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US6857965B2Feb 22, 2005
Suspension swing with a recline mechanism and a method of using the same
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