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Patents for Alexander F. Roberts
Patents 1 - 15 of 57
First set of recordsNext set of recordsLast set of records
57,565Aug. 28, 1866P. PryibilImprovement in sawmillsbandsaws
58,726Oct. 09, 1866J. HoytImprovement in sawing machinesfirewood machines
59,125Oct. 23, 1866J.N. DennissonImprovement in water pumps
59,882Nov. 20, 1866T.J. WellsImproved peat machine
60,151Dec. 04, 1866A.T. De PuyImprovement in printers' galleysprinter
60,621Dec. 18, 1866T.H. CushingReciprocating saw for cutting arcsreciprocating saws
61,046Jan. 08, 1867A. BuellImprovement in head-blocks for sawmillssawmill headblocks
RE2,487Feb. 19, 1867C.W. CoeImprovement in drilling and bolt-tapping machinesdrill presses
65,304May 28, 1867L. TiltonImprovement in device for transmitting motionwoodworking machine mechanisms
67,316Jul. 30, 1867W. KesterImprovement in machines for making slate-framesspecialty machines
67,346Jul. 30, 1867C.H. PorterImprovement in Corking Bottlescombination cork extractors
69,526Oct. 01, 1867G. Smith, J.N. WrigleyImprovement in cut-off valve-gearsteam engine valve gear
69,527Oct. 01, 1867G. Smith, J.N. WrigleyImprovement in steam safety-valvessteam engine valves
70,547Nov. 05, 1867J. GrahamBevel & Try Squarebevels
72,273Dec. 17, 1867D. DickImprovement in wood-turning lathesspool or bobbin machines
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