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GWYNNE JOHN

Overview
  • Total Patents
    13
About

GWYNNE JOHN has a total of 13 patent applications. Its first patent ever was published in 1893. It filed its patents most often in United Kingdom, Spain and United States. Its main competitors in its focus markets chemical engineering and machines are SINCLAIR GEORGE, ROSANO HENRI L and PARRATT DAVID.

Patent filings in countries

World map showing GWYNNE JOHNs patent filings in countries
# Country Total Patents
#1 United Kingdom 11
#2 Spain 1
#3 United States 1

Patent filings per year

Chart showing GWYNNE JOHNs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Chemical engineering
#2 Machines

Focus technologies

# Technology
#1 Mixing
#2 Unspecified technologies

Top inventors

# Name Total Patents
#1 Gwynne John 12
#2 Sargeant Edward Washbourn 8
#3 Crewe Henry Thomas 1

Latest patents

Publication Filing date Title
GB190709487A Improvements in Centrifugal Pumps.
GB190603462A Improvements in Centrifugal Pumps.
US721036A Apparatus for aerating liquids.
GB190122666A Improvements in Means for Aerating Liquids.
GB190110220A Improvements in Carburetting Apparatus for Explosion Engines.
GB190005502A Improvements in and Means for Aerating Slimes.
GB189906829A Improvements in Centrifugal Pumps.
GB189825988A Improvements in Centrifugal Pumps.
GB189707133A Improved Method and Machinery or Apparatus for Cooling Liquids.
GB189523751A Improvements in Apparatus for Pumping and Dredging.
GB189424414A Improvements in Pumping Apparatus, applicable for Dredging Purposes.
GB189322135A Improvements in Dredging Apparatus.