Patents Granted on 1953-04-07


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Patents Granted on 1953-04-07
Patents 1 - 4 of 4
Number	Date	Patentee	Title	Type
2,633,678	Apr. 07, 1953	H.F. Smith	Machine Tool and Method of Operation	metalworking machine mechanisms
2,633,777	Apr. 07, 1953	J.H. Hoern	Indexing mechanism for station type machines	vertical boring mills
2,634,086	Apr. 07, 1953	W.E. Johns	Valve with self-contained stem centering device
2,634,404	Apr. 07, 1953	T.F. Carmichael	Phase indicator