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LAWRENCE HOLDINGS OVERSEAS LTD

Overview
  • Total Patents
    14
About

LAWRENCE HOLDINGS OVERSEAS LTD has a total of 14 patent applications. Its first patent ever was published in 1953. It filed its patents most often in United Kingdom, United States and Canada. Its main competitors in its focus markets machine tools, thermal processes and surface technology and coating are MO AVIAT T I IM K E TSIALKOVSK, DAIWA STEEL TUBE IND and CIRCLE PROSCO INC.

Patent filings in countries

World map showing LAWRENCE HOLDINGS OVERSEAS LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 7
#2 United States 3
#3 Canada 2
#4 Germany 2

Patent filings per year

Chart showing LAWRENCE HOLDINGS OVERSEAS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lawrence John William 6
#2 William Lawrence John 3
#3 Lawrence John W 2
#4 Butler Michael 1
#5 Bennett Malcolm James 1
#6 Southorn Arthur James 1

Latest patents

Publication Filing date Title
GB900225A Improvements relating to secondary surface heat exchangers of the fin and tube type
GB889257A Improvements relating to heat exchangers
GB860403A Improved heat exchanger tube
GB820153A Improvements in the manufacture of heat exchangers
DE1085485B Device for the independent production of rectangular tubes with a folded seam
US2806445A Tinning apparatus for strip metal
GB783117A An improved machine for producing lock-seamed tubing
GB776793A Improvements relating to tinning apparatus
GB775675A Improvements in finned tube core structures for heat exchangers
US2967500A Tube drawing machine
US2876723A Machine for producing fins for finned tube core structures
CA576020A Punching machine for producing fins
CA563615A Slotted shoe for guiding strip metal in tinning