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CLARK JOHN CALHOUN

Overview
  • Total Patents
    11
About

CLARK JOHN CALHOUN has a total of 11 patent applications. Its first patent ever was published in 1896. It filed its patents most often in United Kingdom and United States. Its main competitors in its focus markets machines, chemical engineering and engines, pumps and turbines are SVEDALA ARBRA AB, JIANGSU MIYOU POWDER NEW EQUIPMENT MFG CO LTD and AEROFALL MILLS INC.

Patent filings in countries

World map showing CLARK JOHN CALHOUNs patent filings in countries
# Country Total Patents
#1 United Kingdom 9
#2 United States 2

Patent filings per year

Chart showing CLARK JOHN CALHOUNs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Clark John Calhoun 11

Latest patents

Publication Filing date Title
GB191228932A Improvements in Screens or Separators.
GB191228933A Improvements in Pulverizing Mills.
GB190925122A Improvements in Grinding Mills.
GB190924445A Improvements in Pulverizing Mills.
US889201A Vapor-condenser.
GB190616618A Improvements in Screening or Sifting Apparatus.
GB190616619A A New or Improved Pulverizer.
GB189813940A Improvements in or relating to Grinding or Pulverizing Machines.
US639360A Journal-box for pulverizing-machines.
GB189717100A Improvements in Pulverizing Machines.
GB189617651A Improvements in Pulverizing Machines.