Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1985-12-13
1989-04-25
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350535, 350536, 356244, 356397, 422 65, 422 73, G01N 128, G01N 2101
Patent
active
048242306
ABSTRACT:
Apparatus for indicating the presence of a liquid on a member includes a substrate having a pattern thereon that is perceptibly visually modified by the presence of a liquid on the member.
REFERENCES:
patent: 4154795 (1979-05-01), Thorne
patent: 4171866 (1979-10-01), Tolles
patent: 4321330 (1982-03-01), Baker et al.
patent: 4710031 (1987-12-01), Kelly et al.
Callaghan Terry S.
Corbin John K.
E. I. Du Pont de Nemours and Company
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