4. Photography and optical equipment
  5. Projector or viewer
  6. With provision for transparency magazine
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Okuyamal Tooru

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Olsen Bill R.

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Olson, decesed DeForrest A.

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Onishi Toru

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Onoue Yasuyoshi

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Ooya Tetsuro

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Ort Wolfgang

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Osawa & Co. (USA) Inc.

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Osterlin Kenneth

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Ostlund Roland S.

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Overman John W.

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Owen, III John J.

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Owens Harry

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Papke Friedrich

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Peck Robert F.

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Pelton R. G.

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Penney Richard

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Penton/IPC, Inc.

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Petschnikoff Elinor B.

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Pfeffer T. A.

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