All Patents in class 434/348


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

All Patents in class 434/348
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	3,097,435	Jul. 16, 1963	H. Goldschmidt	Self testing device
	3,181,252	May 04, 1965	H. Goldschmidt, A.B. Sanford	Teaching device (tutor toy)
	3,230,642	Jan. 25, 1966	H. Goldschmidt	Teaching and testing apparatus