Individual holder
SPENGLER CHARLES W
US·8 granted patents·268 citations·filing 1984–2005
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
8 records- 0195US4528941AFree-standing environmental chambers supported by plenumSPENGLER CHARLES W·Filed 1984·Granted Jul 16, 1985·77 cites·14 claims
- 0279US4804392AClean air facilitySPENGLER CHARLES W·Filed 1987·Granted Feb 14, 1989·79 cites·18 claims
- 0369US7462213B2Method of minimizing cross contamination between clean air rooms in a common enclosureSPENGLER CHARLES W·Filed 2005·Granted Dec 9, 2008·4 cites·17 claims
- 0469US4917046AAerosol testing method and chamber for experimental animalsSPENGLER CHARLES W·Filed 1988·Granted Apr 17, 1990·24 cites·8 claims
- 0568US4732592APortable clean air facilitySPENGLER CHARLES W·Filed 1986·Granted Mar 22, 1988·30 cites·7 claims
- 0662US4900342ABlower-filter assemblySPENGLER CHARLES W·Filed 1988·Granted Feb 13, 1990·20 cites·13 claims
- 0757US4781146AAerosol testing chamber for experimental animalsSPENGLER CHARLES W·Filed 1986·Granted Nov 1, 1988·17 cites·24 claims
- 0856US4622771ACommunication display deviceSPENGLER CHARLES W·Filed 1985·Granted Nov 18, 1986·17 cites·15 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →