Printed matter – Calendar
Patent
1987-04-02
1988-10-11
Bell, Paul A.
Printed matter
Calendar
283 48R, B42D 1500
Patent
active
047766123
ABSTRACT:
A recording device for recording results of a series of chemical tests, each of said tests being adapted to produce a change of color or other visual texture of a test material, said recording device comprising:
REFERENCES:
patent: 1979283 (1934-11-01), Osborn
patent: 3964871 (1976-06-01), Hochstrosser
patent: 4174178 (1979-11-01), Ouchi et al.
patent: 4270772 (1981-06-01), Bodily
patent: 4523852 (1985-06-01), Bauer
patent: 4568184 (1986-02-01), Krantz et al.
Bell Paul A.
Unilever Patent Hall, B.V.
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