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Class Information
Number: 40/115
Name: Card, picture, or sign exhibiting > Calendars > Rotatable > Single axis > Disk
Description: Calendars comprising several charactered disks of different sizes mounted concentrically to turn a single axis. The disks may be upon the face of a suitable support and present rings of characters, or they may be upon the rear of the support, and the characters exposed through suitable sight-openings.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7140132 |
Perpetual calendar wheel chart |
Nov. 28, 2006 |
| 6637137 |
Gestation calendar |
Oct. 28, 2003 |
| 6160766 |
Calendar indicator |
Dec. 12, 2000 |
| 5943298 |
Multi-dimensional calendar |
Aug. 24, 1999 |
| 5732490 |
Perpetual calendar |
Mar. 31, 1998 |
| 5313723 |
Perpetual calendar |
May. 24, 1994 |
| 5289649 |
Perpetual calendar |
Mar. 1, 1994 |
| 4285148 |
Universal round clock calendar |
Aug. 25, 1981 |
| 4161099 |
Day and date indicator for clocks |
Jul. 17, 1979 |
| 4026052 |
Multi-disk rotatable year calendar |
May. 31, 1977 |
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