PH meter

- Corning Glass Works

FIG. 1 is a right front perspective view of a pH meter showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image thereto;

FIG. 3 is a front elevational view thereof as taken from line 3--3 of FIG. 2;

FIG. 4 is a rear elevational view thereof as taken from line 4--4 of FIG. 2 .

Referenced Cited
U.S. Patent Documents
D181743 December 1957 Molloy
D219998 February 1971 Behnk
2764892 October 1956 Rosenthal
3170111 February 1965 Case
Patent History
Patent number: D251114
Type: Grant
Filed: Jan 3, 1977
Date of Patent: Feb 20, 1979
Assignee: Corning Glass Works
Inventor: Robert S. Potts (Sherborn, MA)
Primary Examiner: Nelson C. Holtje
Attorney: Clarence R. Patty, Jr.
Application Number: 5/756,175