Inventor · disambiguated record
Robbert E. Spangenberg
Also filed as: SPANGENBERG ROBBERT E
4 granted patents·118 citations·filing 1985–1988
79Inventor score
Files withHUNTER DOUGLAS INTERNATIONAL4
Top patents by PatentIndex Score
4 records- 0180US4685502AMultiple-glazed window assemblyHUNTER DOUGLAS INTERNATIONAL·Filed 1985·Granted Aug 11, 1987·57 cites·26 claims
- 0267US4723586AVenetian blindHUNTER DOUGLAS INTERNATIONAL·Filed 1985·Granted Feb 9, 1988·38 cites·18 claims
- 0345US4667723ACord lockHUNTER DOUGLAS INTERNATIONAL·Filed 1986·Granted May 26, 1987·19 cites·14 claims
- 0431US4958421AMethod for assembling a venetian blindHUNTER DOUGLAS INTERNATIONAL·Filed 1988·Granted Sep 25, 1990·4 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →