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LONG ERWIN L

Overview
  • Total Patents
    13
About

LONG ERWIN L has a total of 13 patent applications. Its first patent ever was published in 1964. It filed its patents most often in Canada and United States. Its main competitors in its focus markets civil engineering, environmental technology and thermal processes are HEROLD ANDREAS, NORDWIND S R L and YAMAHA KAKO KENSETSU KK.

Patent filings in countries

World map showing LONG ERWIN Ls patent filings in countries
# Country Total Patents
#1 Canada 9
#2 United States 4

Patent filings per year

Chart showing LONG ERWIN Ls patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Long Erwin L 13

Latest patents

Publication Filing date Title
US5238053A Method of and system for warming road surface
US5190098A Thermosyphon with evaporator having rising and falling sections
CA2062379A1 Pile load testing device
CA1045837A Method and structural support for increasing load-carrying capacity in permafrost
US4067198A Method and structural support for increasing load carrying capacity in permafrost
CA974072A Blade pile and method for increasing the bearing strength of pile
CA978761A Blade pile and method for increasing the bearing strength of pile
CA968976A Method and apparatus for improving bearing strength of piles in permafrost
US3217791A Means for maintaining perma-frost foundations
CA767887A Earth temperature control apparatus for use in permafrost regions