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DRYSDALE & CO LTD

Overview
  • Total Patents
    195
About

DRYSDALE & CO LTD has a total of 195 patent applications. Its first patent ever was published in 1912. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets engines, pumps and turbines, transport and environmental technology are JOENKOEPINGS MEK WERKSTADS, WORTHINGTON SIMPSON and FRANK MOHN FUSA A S.

Patent filings in countries

World map showing DRYSDALE & CO LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 122
#2 France 22
#3 United States 16
#4 Canada 13
#5 Spain 8
#6 Denmark 5
#7 Germany 4
#8 Sweden 3
#9 Norway 2

Patent filings per year

Chart showing DRYSDALE & CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Carslaw Charles Henderson 19
#2 Young John 9
#3 Carslaw C 7
#4 Carslaw Charles H 7
#5 Nicol James B 6
#6 Wilson Drysdale John Whitehead 6
#7 John Young 4
#8 Nicol James Blackburn 4
#9 Drysdale John Whitehead Wilson 4
#10 Drysdale William 2

Latest patents

Publication Filing date Title
GB1223335A Improvements in or relating to pump assemblies
GB1210562A Improvements relating to the treatment of sewage and like industrial waste
GB1211140A Improvements relating to the treatment of sewage and like industrial waste
GB1207693A Improvements in or relating to plants for the treatment of sewage
GB1175281A Improvements in or relating to Distillation Apparatus.
GB1218564A Pumping installation for raising a liquid in stages
GB1105418A Improvements in or relating to devices for the protection of apparatus against flooding
GB1174767A Improvements in or relating to Centrifugal Pumps
GB1071548A Improvements in or relating to pumps
GB1122381A Device for generating curved surfaces
US3291351A Unloading of bulk liquid or pulverulent cargoes from cargo ships
GB1057177A Improvements in or relating to ships constructed to carry bulk liquiform material
GB1034039A Improvements in or relating to transverse thrust units for ships
GB1037297A Improved pumping installation for cargo ships arranged to carry liquid bulk cargo
GB1094901A Improvements relating to the treatment of sewage and like industrial wastes
GB1014926A Improvements in or relating to stabilizing apparatus for ships
GB1015714A Improvements relating to ships' cargo tanks with means for the unloading of bulk liquid or pulverulent cargoes
GB1092093A Improvements relating to liquid carrying vessels to facilitate the discharge therefrom of the liquid
GB1071153A Improved fluid fuel supply apparatus for burners
GB945728A Improvements in or relating to gates for dry docks