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Viewing device
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Patent number 6,927,907
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Issue date Aug 9, 2005
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PENTAX Corporation
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number 6,822,807
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Issue date Nov 23, 2004
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PENTAX Corporation
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number 6,785,058
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Issue date Aug 31, 2004
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PENTAX Corporation
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Shuji Yoneyama
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G02 - OPTICS
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Photographing lens system
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Patent number 6,532,342
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Issue date Mar 11, 2003
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PENTAX Corporation
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Shuji Yoneyama
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Zoom lens system
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Patent number 6,353,505
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Issue date Mar 5, 2002
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number 6,208,471
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Issue date Mar 27, 2001
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Takashi Enomoto
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G02 - OPTICS
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Photographic lens
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Patent number 6,181,487
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Issue date Jan 30, 2001
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Photographic lens
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Patent number 6,181,488
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Issue date Jan 30, 2001
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number 6,128,140
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Issue date Oct 3, 2000
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number 6,078,435
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Issue date Jun 20, 2000
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Close-up attachment lens
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Patent number 6,002,533
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Issue date Dec 14, 1999
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Zoom lens system
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Patent number RE36326
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Issue date Oct 5, 1999
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Asahi Kogaku Kogyo Kaisha
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Takayuki Ito
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359 - Optical: systems and elements
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Zoom lens system
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Patent number 5,793,533
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Issue date Aug 11, 1998
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G02 - OPTICS
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Shiftable lens system
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Patent number 5,701,205
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Issue date Dec 23, 1997
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Sachio Hasushita
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G02 - OPTICS
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Tilting lens system
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Patent number 5,642,223
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Issue date Jun 24, 1997
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Sachio Hasushita
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G02 - OPTICS
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Camera with stereoscopic optical system
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Patent number 5,581,314
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Issue date Dec 3, 1996
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Stereo photographing system
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Patent number 5,570,150
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Issue date Oct 29, 1996
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Asahi Kogaku Kogyo Kabushiki Kaisha
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Shuji Yoneyama
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY