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Patents for Hall Manufacturing Co.
Patents 46 - 57 of 57
First set of recordsPrevious set of recordsLast set of records
NumberDatePatenteeTitleType
GB-501,338Feb. 22, 1939H.M. Co.Valve Seat Grinding Meansvalve reseating tools
2,150,621Mar. 14, 1939E.A. HallPilot for Valve Seat Facing Toolsvalve reseating tools
2,176,071Oct. 17, 1939E.A. HallCollet Constructioncollets and collet holders
2,221,918Nov. 19, 1940E.A. Hall, K.R. BohnValve Grinding Machinevalve grinding tools
2,318,854May 11, 1943E.A. HallPortable Valve Seat Grinding Meansvalve grinding tools
2,338,484Jan. 04, 1944R.S. BeverlinGrinding Toolvalve grinding tools
2,338,509Jan. 04, 1944E.A. Hall, R.S. BeverlinGrinding Machinevalve grinding tools
2,338,763Jan. 11, 1944E.A. Hall, R.S. BeverlinPortable Grinding Machinevalve grinding tools
2,363,384Nov. 21, 1944R.S. BeverlinMethod of Grinding Valve Seats and Similar Areasvalve grinding tools
CA-429,298Aug. 07, 1945R.S. BeverlinGrinding Toolvalve and seat maintenance
CA-429,299Aug. 07, 1945E.A. Hall, R.S. BeverlinPortable Grinding Machinevalve and seat maintenance
CA-429,300Aug. 07, 1945E.A. Hall, R.S. BeverlinGrinding Machinevalve and seat maintenance
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