Inventor
RITCHIE JAMES K
US4 patents
Patents
4 patentsUS6371503B2Apr 16, 2002
Wheelchair automatic anti-rollback assembly
210 INNOVATIONS LLC30 citations89
US6279936B1Aug 28, 2001
Wheelchair automatic anti-rollback assembly
210 INNOVATIONS LLC15 citations89
US6092824AJul 25, 2000
Wheelchair automatic anti-rollback assembly
210 INNOVATIONS LLC30 citations89
US6963286B2Nov 8, 2005
Wheelchair and alarm therefor
210 INNOVATIONS LLC9 citations70