4. Optics: measuring and testing
  5. Refraction testing
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Dorsman Adrian K.

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Duffield Jack J.

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Durst AG Fabrik Fototechnischer Apparate Bozer

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Dyche George E.

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Dyna-Tech Corporation

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Easterday Richard Lee

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Electro-tec Corporation

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Ellis Delmar H.

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Enami Toyoichiro

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Enomoto Hirobumi

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Erwin Sick Optik-Elektronik

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Federico Zagara

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Fehrs Delmer Lee

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Figueroa David Richard

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Fishel Grace

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Ford M. William

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Forman Paul F.

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Frank Gomer S.

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Franz Schmidt & Haensch GmbH & Co.

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Frazee, Jr. Ralph Edward

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