Color comparator for testing swimming pools

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Information

Patent Grant
D247821

References
Source

Patent Number
D247,821
Date Filed
Tuesday, June 15, 1976
49 years ago
Date Issued
Tuesday, May 2, 1978
48 years ago

Inventors
- Richard Allen Biersch
- Martin Liebert
Original Assignees
- TELAUTOGRAPH CORPORATION
Examiners
- Ansher; Bernard
Agents
- Lindenberg; Samuel

US Classifications
- D24 - Medical and laboratory equipment
- D10 - Measuring, testing, or signalling instruments
Field of Search
- US
- D10 46
- D10 81
- D24 17
- 356 246
- 356 182
International Classifications
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The design for a color comparator for testing swimming pools, as shown.

US Referenced Citations (5)

Number	Name	Date	Kind
D232037	Hach et al.	Jul 1974
D232038	Hach et al.	Jul 1974
3176577	Frank	Apr 1965
3381572	Tuwiner	May 1968
3964831	Frank	Jun 1976