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BARKER JOHN

Overview
  • Total Patents
    31
About

BARKER JOHN has a total of 31 patent applications. Its first patent ever was published in 1898. It filed its patents most often in United Kingdom, United States and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets medical technology, civil engineering and machines are SCHNEIDER SHILEY USA INC, MCFARLANE RICHARD H and ENOVE PREC PLASTICS CATHETER CO LTD.

Patent filings in countries

World map showing BARKER JOHNs patent filings in countries

Patent filings per year

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

Top inventors

# Name Total Patents
#1 Barker John 27
#2 Mcwethy Robert 4
#3 Challiol Bernardo 3
#4 Halseth Thor 3
#5 Kovalski Joseph 2
#6 Halseth Thor R 2
#7 Hunter James 1
#8 Austin Alfred Thomas 1
#9 Phillips Thomas 1
#10 Douglas Tony 1

Latest patents

Publication Filing date Title
US8708370B1 Safety enhancement for a safety belt
US2011248418A1 Moulding Method and A Moulding Machine
GB0814267D0 Accidental defrost detevtor(ADD)
US2007095526A1 Safety shield for rotary drilling rigs
GB0212305D0 Controlled dosing device
WO02074361A2 Retractable needle medical device for injecting fluid from a pre-filled cartridge
GB9928930D0 Valve lock
US1296905A Folding canopy-chair.
US1225917A Folding sunshade and tent.
GB191505771A Improvements in or relating to Certain Metallic Parts of Saddles for Horses, and to the Mode of and Means for Manufacturing the same.
GB191500748A Improvements in or relating to certain Metallic Parts of Saddles for Horses, and to the Manufacture of the same.
CA157844A Protractor square
GB191323307A Improvements in or relating to Doors Automatically Operated.
CA157959A Door
US1043502A Folding steel square.
GB191114548A Improvements in Spirals for Spirally Guided Gas Holders and in the Fixing of these.
US952177A Carpenter's square.
GB190616384A Improved Machine for Mixing Concrete and other like Materials.
GB190327121A Improvements in and relating to Self Sealing Retort Lids.
CA80218A Apparatus for raising sunken vessels