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Class Information
Number: 368/235
Name: Horology: time measuring systems or devices > Displays or display device details > Dial or hand > Including dial details only > Of drum or plate type
Description: Subject matter wherein the dial elements are cylindrically-shaped and rotate with respect to a time reference indicator, (e.g., window, fixed mark, etc.), or wherein planar elements are pivotally attached to cylindrically-shaped elements which rotate allowing the planar elements to sequentially indicate the time.

Patents under this class:

Patent Number Title Of Patent Date Issued
7961561 Handless time display Jun. 14, 2011
7609589 Perpetual calendar clock Oct. 27, 2009
6898154 Clock-driving device combined with a conventional core May. 24, 2005
4568197 Time piece Feb. 4, 1986
4430004 Multi-faced clock Feb. 7, 1984
4423965 Elongated clock Jan. 3, 1984
4192136 Adjustment of readout members in a digital clock Mar. 11, 1980
4178752 Shutter type digital clocks Dec. 18, 1979
4151669 Leaf type indicating device May. 1, 1979
4092823 Timepiece having display cylinders Jun. 6, 1978
4060972 Digital clock Dec. 6, 1977
4005570 Leaf-type digital clock Feb. 1, 1977
3972179 Changeable display device Aug. 3, 1976
3950939 Digital display with stepping device Apr. 20, 1976

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