Learn more

CLERK DUGALD

Overview
  • Total Patents
    27
About

CLERK DUGALD has a total of 27 patent applications. Its first patent ever was published in 1881. It filed its patents most often in United Kingdom, United States and Switzerland. Its main competitors in its focus markets engines, pumps and turbines, basic materials chemistry and environmental technology are TOHATSU KK, GASMOTORENFABRIK DEUTZ and HANSHIN DIESEL WORKS.

Patent filings in countries

World map showing CLERK DUGALDs patent filings in countries
# Country Total Patents
#1 United Kingdom 22
#2 United States 3
#3 Switzerland 1
#4 Spain 1

Patent filings per year

Chart showing CLERK DUGALDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Clerk Dugald 26
#2 Bradley Henry Wentworth 7
#3 Bickerton Henry Nield 4
#4 Bickerton Henry Neild 3
#5 Parsons Charles Algernon 1
#6 Cook Stanley Smith 1

Latest patents

Publication Filing date Title
GB191224398A Improvements in the Application of Internal Combustion Engines to Marine Propulsion.
GB191011444A Improvements in Gas Producers.
GB190601496A Improvements in and relating to Internal Combustion Engines.
GB190417960A Improvements relating to Internal Combustion Motors.
GB190417961A Improvements relating to Internal Combustion Motors.
GB190414584A Pile Fabrics
GB190414587A Improvements in Range Finders.
GB190413406A Improvements in Relief Valves for Cylinders and the like
US769589A Gas or other internal-combustion engine.
US896893A Internal-combustion engine.
GB190328815A Improvements in Internal Combustion Engines.
US983206A Internal-combustion engine.
GB190308088A Improvements in Gas and other Internal Combustion Engines
GB190228827A Improvements in Internal Combustion Engines.
GB189911283A An Improved Inking Mechanism for Printing Presses.
GB189811009A Improvements relating to Stuffing Boxes, Glands, and the like.
GB189725551A Improvements in and relating to Machines for Labelling Bottles and like Articles.
GB189722636A Process for Reproducing Tapestry Paintings.
GB189612439A Improvements in Oil Engines.
GB189517788A Improvements in Electro Motors.