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WALKER JAMES JOHN

Overview
  • Total Patents
    34
About

WALKER JAMES JOHN has a total of 34 patent applications. Its first patent ever was published in 1904. It filed its patents most often in United Kingdom, United States and Switzerland. Its main competitors in its focus markets consumer goods, machine tools and computer technology are STODDARD CHARLES F, LUDWIG HUPFELD AKTIEN GES and COLDMAN HENRY CHARLES.

Patent filings in countries

World map showing WALKER JAMES JOHNs patent filings in countries
# Country Total Patents
#1 United Kingdom 14
#2 United States 8
#3 Switzerland 6
#4 Canada 3
#5 Austria 1
#6 Denmark 1
#7 Spain 1

Patent filings per year

Chart showing WALKER JAMES JOHNs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Walker James John 27
#2 James John Walker 6
#3 Walker James Hubert Phipps 2

Latest patents

Publication Filing date Title
GB120438A Improvements in and relating to Jigs for use in Drilling and Boring Operations.
GB106308A Improvements in and relating to Jigs for use in Drilling and Boring Operations.
US1173232A Tune-sheet for automatic musical instruments.
US1179688A Automatic musical instrument.
GB191016903A Improvements in or relating to Automatic Musical Instruments and Tune Sheets therefor.
CA131403A Apparatus for making music records
US1017932A Apparatus for automatically playing pianofortes, carillons, and other musical instruments.
US967274A Apparatus for producing music-records.
GB190825163A Improvements in or connected with Automatically-played Musical Instruments.
GB190910133A Improvements in or relating to Apparatus for Automatically Playing Pianofortes, Carillons and other Musical Instruments.
GB190815251A Improvements in or relating to Apparatus for Automatically Playing Pianofortes, Carillons and other Musical Instruments.
GB190815250A Improvements in or relating to the Recording of Music Played upon Pianofortes, Carillons and similar Instruments, and Apparatus therefor.
US911789A Automatic player for musical instruments.
US1012178A Music-record for use in automatic musical instruments.
CA100784A Musical apparatus
US872267A Recording music.
GB190527043A Improvements in or connected with Automatic Musica Instruments, or Automatic Players for Musical Instruments.
CA99907A Music record
GB190521886A Improvements in or connected with the Pistons and Draw Stops of Organs.
US993479A Self-playing musical instrument.