Patents for Richard L. Campbell


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


Quick search:	Patent number:	Patent Date:

Patents for Richard L. Campbell
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,155,890	Apr. 25, 1939	R.L. Campbell	Heating System
	2,176,852	Oct. 17, 1939	R.L. Campbell	Heating Method and Apparatus