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Box 52

 Container

Contains 14 Results:

Patent #2,099,298 - Electrical Testing Apparatus, 1932-1955

 File — Box: 52, Folder: 12-14
Dates: 1932-1955
Found in: Science History Institute Archives / Beckman Historical Collection / Series IX. Patent Files

Patent #2,232,211 - Automatic Voltage and pH Indicators, 1932-1941

 File — Box: 52, Folder: 15-17
Dates: 1932-1941
Found in: Science History Institute Archives / Beckman Historical Collection / Series IX. Patent Files

Patent #2,232,212 - Apparatus for Analyzing Direct Current Voltages and Currents, 1939-1951

 File — Box: 52, Folder: 18-19
Dates: 1939-1951
Found in: Science History Institute Archives / Beckman Historical Collection / Series IX. Patent Files

Patent #2,256,733 - Electrodes for the Electrical Determination of pH, 1937-1948

 File — Box: 52, Folder: 20-21
Dates: 1937-1948
Found in: Science History Institute Archives / Beckman Historical Collection / Series IX. Patent Files

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