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LEWIS DAVID J

Overview
  • Total Patents
    11
About

LEWIS DAVID J has a total of 11 patent applications. Its first patent ever was published in 1959. It filed its patents most often in United Kingdom, United States and Canada. Its main competitors in its focus markets machine tools, telecommunications and machines are OBERHEIM STEPHEN C, REX CAMERON LUCAS and WESSELMANN BRUNO.

Patent filings in countries

World map showing LEWIS DAVID Js patent filings in countries
# Country Total Patents
#1 United Kingdom 7
#2 United States 3
#3 Canada 1

Patent filings per year

Chart showing LEWIS DAVID Js patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Lewis David J 4
#2 Inkster Kevin R 2

Latest patents

Publication Filing date Title
GB9710722D0 Vehicle security device
GB9622885D0 Security device for preventing the scaling of walls or fences
GB9405283D0 Retractable security bars
GB9405284D0 Internal combustion rotary engine
GB9317454D0 Vehicle immobilising device
GB9311844D0 Internal combustion rotary engine
CA1322319C Portable saw mill
US3230481A Method for segregating harmonic power in a waveguide system
US3078423A Apparatus for segregating harmonic power in a waveguide system