Assignee
PRODUCT DESIGN & DEV INC
US·6 granted patents·385 citations·filing 1980–1992
Top patents by PatentIndex Score
6 records- 0198US5157808ACoil spring counterbalance hardware assembly and connection method thereforPRODUCT DESIGN & DEV INC·Filed 1992·Granted Oct 27, 1992·141 cites·3 claims
- 0290US4683676ATilt window balance shoe assemblyPRODUCT DESIGN & DEV INC·Filed 1985·Granted Aug 4, 1987·72 cites·10 claims
- 0387US4935987ASelf-contained heavy duty constant force sliding sash counterbalance assemblyPRODUCT DESIGN & DEV INC·Filed 1989·Granted Jun 26, 1990·70 cites·6 claims
- 0472US4324072AInsulated multiple component single plane building structure portal closurePRODUCT DESIGN & DEV INC·Filed 1980·Granted Apr 13, 1982·33 cites·12 claims
- 0570US5119591AVertically slidable window unitPRODUCT DESIGN & DEV INC·Filed 1991·Granted Jun 9, 1992·41 cites·5 claims
- 0668US4570381ASingle plane window or door structurePRODUCT DESIGN & DEV INC·Filed 1984·Granted Feb 18, 1986·28 cites·13 claims
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