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Class Information
Number: 434/149
Name: Education and demonstration > Geography > Means indicating time at different points on earth
Description: Subject matter including means giving the relative time at various locations on the earth.










Patents under this class:

Patent Number Title Of Patent Date Issued
8591234 Kits and methods for exploring mathematical concepts Nov. 26, 2013
8221125 Electronic presentation of world time zones Jul. 17, 2012
6612843 Globe base educational device Sep. 2, 2003
5186630 Universal sun-path dial Feb. 16, 1993
4971559 Globe having means for indicating a day and night boundary Nov. 20, 1990
4194306 Planetarium educational device Mar. 25, 1980
4032754 Global time system Jun. 28, 1977
 
 
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