Camera
November 22, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesZoom lens system Compact zoom lens barrel with high zooming ratio Macro zoom lens barrel Zoom lens Zoom lens assembly One-hand zoom lens barrel Automatic focusing device for use in a camera Variable focusing lens barrel Variable focal lens device Zoom lens drive mechanism of a camera InventorsAssigneeApplicationNo. 444838 filed on 11/22/1999US Classes:359/696, Motor driven359/697, Condition responsive396/82Focus position adjusted according to focal lengthExaminersPrimary: Mack, RickyAttorney, Agent or FirmForeign Patent References
International ClassesG02B 015/14G03B 017/00 Foreign Application Priority Data1993-04-30 JPAbstractA zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.Other References
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