Color comparator for testing swimming pools

- Telautograph Corporation
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Description

FIG. 1 is a front perspective of a color comparator for testing swimming pools, showing our new design,

FIG. 2 is a front elevation thereof;

FIG. 3 is a side elevation thereof;

FIG. 4 is a rear elevation thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D232037 July 1974 Hach et al.
D232038 July 1974 Hach et al.
3176577 April 1965 Frank
3381572 May 1968 Tuwiner
3964831 June 22, 1976 Frank
Patent History
Patent number: D247821
Type: Grant
Filed: Jun 15, 1976
Date of Patent: May 2, 1978
Assignee: Telautograph Corporation (Los Angeles, CA)
Inventors: Richard Allen Biersch (Arcadia, CA), Martin Liebert (Rancho Palos Verdes, CA)
Primary Examiner: Bernard Ansher
Attorney: Samuel Lindenberg
Application Number: 5/696,264
Classifications
Current U.S. Class: D24/17; Measuring, Regulating Or Indicating Instrument, Or Casing (D10/46)
International Classification: D2402;