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.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 5 | |
#2 | Canada | 2 | |
#3 | France | 2 | |
#4 | United Kingdom | 2 |
# | Industry | |
---|---|---|
#1 | Mechanical elements | |
#2 | Machines | |
#3 | Electrical machinery and energy |
# | Technology | |
---|---|---|
#1 | Venting or aerating devices | |
#2 | Unspecified technologies | |
#3 | Electric switches | |
#4 | Unspecified technologies | |
#5 | Magnets and transformers |
# | 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 |
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 |