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LELAND GIFFORD CO

Overview
  • Total Patents
    69
About

LELAND GIFFORD CO has a total of 69 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machine tools, machines and mechanical elements are BURGMASTER CORP, CHICAGO NIPPLE MFG COMPANY and NAT AUTOMATIC TOOL CO.

Patent filings in countries

World map showing LELAND GIFFORD COs patent filings in countries
# Country Total Patents
#1 United States 57
#2 Canada 9
#3 United Kingdom 3

Patent filings per year

Chart showing LELAND GIFFORD COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hirvonen Eric J 32
#2 Bishop Benjamin S T 15
#3 Gifford Albert J 8
#4 Abadjieff Ivan V 7
#5 Bicknell Frank A 4
#6 Schmidt William D 2
#7 Jacobson Henry A 2
#8 Allen Jr Edward K 2
#9 Kriewall Fred W 2
#10 Hirvonen Eric John 2

Latest patents

Publication Filing date Title
US3019674A Boring bar construction
US2978250A Making collets
GB875571A Copying attachment for a machine tool
US2914057A Truing tools for a grinding wheel
US3022609A Drill sharpener and point thinner
US2882777A Hydraulic tracing apparatus
US2970576A Valve for control of advance and return of a piston under hydraulic power
GB783570A Hydraulic control mechanism for machine tools
US2854869A Automatic accurate depth control for machine tools
US2781672A Brake or stop mechanism
US2748629A Hydraulic control mechanism for machine tools
US2647407A Machine tool spindle construction
US2582698A Spindle drive for machine tools
US2711549A Driving means for tapping devices and the like
US2685898A Quick-acting precision clamping device
US2582667A Coolant device for tools
US2539468A Electric brake for machine tools and the like
US2645981A Hydraulic indexing mechanism
US2624283A Hydraulic pump
US2610528A Hydraulic drill feed and stroke timing mechanism