All Patents in class 138/109


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All Patents in class 138/109
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
1,904,329	Apr. 18, 1933	C.A. Rich	Stock Guide Means for Machine Tools
2,604,229	Jul. 22, 1952	E. Schwarz	Closure Seal for Vacuum Vessels	manufacturing processes