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  2 items
  Business correspondence

  Letter from Edwin W. Taylor to Arnold O. Beckman

  • 1947-Aug-15

  This letter includes a report on existing Beckman trademarks as of 1947, including information on the "acidimeter" and the point at which that instrument became known as the pH meter (1935).

  • Addressee Beckman, Arnold O.
  • Author Taylor, Edwin W.
  • Subject Hydrogen-ion concentration--Measurement--Instruments, Patents, Trademarks, Beckman Instruments, Inc.