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CALKINS MFG COMPANY

Overview
  • Total Patents
    43
About

CALKINS MFG COMPANY has a total of 43 patent applications. Its first patent ever was published in 1938. It filed its patents most often in United States and Canada. Its main competitors in its focus markets agriculture, transport and measurement are KYLLINGSTAD PLOGFAB AS, LUDWIG FEIST DIPL KFM DR and ADAMS HARD FACING CO.

Patent filings in countries

World map showing CALKINS MFG COMPANYs patent filings in countries
# Country Total Patents
#1 United States 29
#2 Canada 14

Patent filings per year

Chart showing CALKINS MFG COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Guyer Morris W 17
#2 Calkins Dwight L 9
#3 Calkins Claude C 9
#4 Calkins Oscar C 7
#5 Hunt Laurence A 4
#6 Smith Fred T 2
#7 Carrick Larry K 2
#8 Thomas Smith Fred 2
#9 Carrick Lawrence K 2
#10 Henry Domrese 1

Latest patents

Publication Filing date Title
CA2182255A1 Weight distributing hull and keel support for boat trailer frames
CA2105414A1 Weight distributing hull and keel support for boat trailer frames
US3288480A Rod weeder
US3213946A Mounting for rotary hoe type soil cultivators
US3003789A Universal hillside hydraulic hitch
US3072198A Drive mechanism for rod weeders
US2996130A Rotary hoe tandem connection
US2862433A Rod tilling implement
US2822738A Adjustable tractor implement hitch
US2811388A Hydraulically supported sprinkler riser and stand
US2827005A Fluid fertilizer distributor
US2776612A Rotary rod weeder drive
US2784655A Rod weeder
US2772615A Reversible disc plow
US2816497A Tractor implement coupling device
US2765721A Tractor implement linkage
US2644676A Slurry handling device for seed treating machines
US2639836A Seed treater
US2691468A Dispenser for granular materials
US2648986A Pump drive