Patents for Lewis B. Curtis


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Patents for Lewis B. Curtis
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
439,122	Oct. 28, 1890	L.B. Curtis	Pipe and Bolt Threading Attachment for Lathes	metal lathe accessories and attachments
443,500	Dec. 30, 1890	L.B. Curtis, R.P. Curtis	Pipe Threading Machine	pipe threading machines
465,838	Dec. 29, 1891	L.B. Curtis	Pipe Threading Attachment for Lathes	metal lathe accessories and attachments