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LEE FREDERICK W

Overview
  • Total Patents
    14
About

LEE FREDERICK W has a total of 14 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United States. Its main competitors in its focus markets measurement, electrical machinery and energy and audio-visual technology are HANS T F LUNDBERG, SWEDISH AMERICAN PROSPECTING C and ERDA AKT GES.

Patent filings in countries

World map showing LEE FREDERICK Ws patent filings in countries
# Country Total Patents
#1 United States 14

Patent filings per year

Chart showing LEE FREDERICK Ws patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lee Frederick W 14

Latest patents

Publication Filing date Title
US2964700A Magnetic variometer
US2743785A Apparatus for making seismic surveys
US2575349A Geophysical surveying
US2615957A Temperature compensation magnetometer indicator
US2613247A Method of geophysical prospecting
US2556199A Dynamically balanced weight system
US2371629A Means for producing artificial thermals
US2440693A Method for determining the subterranean extension of geologic bodies
US2345608A Geophysical prospecting
US2288628A Electrical phase shifting
US2264318A Geophysical surveying
US1951760A Method of conducting geological survey
US1838315A Magnetic saturation control of electric circuits
US1622039A Apparatus for and method of reproducing sound