pH Meter, or the like

- Fisons Limited

FIG. 1 is a front and top-left isometric view of a pH meter, or the like showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D181743 December 1957 Molloy
D203984 March 1966 Roth
D206264 November 1966 Waligorski
D215564 October 1969 MacPhee
D229968 January 1974 Williams
D249480 September 19, 1978 Jungman
D251114 February 20, 1979 Potts
D255552 June 24, 1980 Schonstedt
D261871 November 17, 1981 Akers
3806797 April 1974 Harvey
4090925 May 23, 1978 Jungman
Foreign Patent Documents
55-17940 May 1980 JPX
Other references
  • IBM Instruments, Inc. (Electrochemical), Cat., 11/82, pp. 14-15, pH Meters at top. Popular Mechanics, 11/78, p. 36, pH Meter at bottom right.
Patent History
Patent number: D275268
Type: Grant
Filed: Dec 28, 1981
Date of Patent: Aug 28, 1984
Assignee: Fisons Limited (Ipswich)
Inventors: James O. Molloy (London), Peter E. Sydenham (London)
Primary Examiner: Nelson C. Holtje
Law Firm: Marshall, O'Toole, Gerstein, Murray & Bicknell
Application Number: 6/335,267
Current U.S. Class: Chemical (12) (D10/81)