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SCHONSTEDT INSTRUMENT CO

Overview
  • Total Patents
    75
About

SCHONSTEDT INSTRUMENT CO has a total of 75 patent applications. Its first patent ever was published in 1967. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets measurement, machines and optics are HANS T F LUNDBERG, LEE FREDERICK W and ERDA AKT GES.

Patent filings per year

Chart showing SCHONSTEDT INSTRUMENT COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Schonstedt Erick O 39
#2 Rippingale John B 19
#3 Upton Charles R 8
#4 Osman Bradley L 8
#5 Schonstedt Erik O 6
#6 Schonstedt Erick Oscar 5
#7 Rippingale John Bamforth 5
#8 Upton Charles Roth 5
#9 Osman Bradley Lawrence 4
#10 Hamzezadeh Mohammed M 2

Latest patents

Publication Filing date Title
US2004145369A1 Magnetic detector extendable wand
US6356082B1 Utility locator radio link
WO9424584A1 Methods of detecting location of magnetically-marked elongated buried objects
US5239290A Magnetic cores for saturable core measuring devices and methods of manufacturing such cores
US5206065A Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5173139A Method for providing magnetic markers on elongated hidden objects
US5138761A Method of manufacturing magnetic detection apparatus
US5136245A Magnetic detection apparatus with sensors mounted on channel or angle cantilever support
US5122750A Methods employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables
US5097211A Magnetic detection appartaus with plastic housing and sound-transmissive handle
US5017873A Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables
ZA9001285B Methods and apparatus employing permanent magnets for marking,locating,tracing and identifying hidden objects such as buried fiber optic cables
US5114517A Methods, apparatus and devices relating to magnetic markers for elongated hidden objects
US5006806A Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as burried fiber optic cables
US4839624A Magnetic cores
US4839623A Magnetic core blanks of magnetically permeable sheet material
US4818944A Magnetic locating and tracing system and method using dual-antenna transmitter to distinguish between concealed adjacent objects
US4747207A Manufacture of magnetic cores from blanks of magnetically permeable sheet material
US4803773A Method of making magnetic cores
US4590425A Magnetic detector apparatus with excitation conductors connected in series via sensor housing