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CIRCLE SEAL CORP

Overview
  • Total Patents
    11
About

CIRCLE SEAL CORP has a total of 11 patent applications. Its first patent ever was published in 1970. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets mechanical elements, machines and electrical machinery and energy are STONEL CORP, SCARAMUCCI DOMER and CROSBY VALVE & GAGE.

Patent filings in countries

World map showing CIRCLE SEAL CORPs patent filings in countries
# Country Total Patents
#1 United States 5
#2 Canada 2
#3 France 2
#4 United Kingdom 2

Patent filings per year

Chart showing CIRCLE SEAL CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Riley James H 3
#2 Plotkin Mathias 2
#3 Titus John S 1
#4 Springer Colby M 1
#5 O'Brien Owen T 1
#6 Wilhelm R 1
#7 Wilhelm Raymond L 1
#8 Peters Jr John 1
#9 Tetrault Leonard P 1

Latest patents

Publication Filing date Title
US5955713A Tilt switch array for electronic orientation detection
US3988706A Solenoid actuating mechanism with variable rate energy storing means
US3985331A High resolution micro-metering valve
CA949424A Combination check and pressure relief valve
CA935350A Pilot-controlled pressure relief valve
GB1323245A Combination check and pressure relief valve
GB1347730A Pilot-controlled pressure relief valve
US3626977A Combination check and pressure relief valve
US3608576A Pilot-controlled pressure relief valve