Assignee
SHIGEMATSU WORKS
JP·11 granted patents·4 pending applications·198 citations·filing 1982–2019
Top patents by PatentIndex Score
15 records- 0182US7464705B2Powered respiratorSHIGEMATSU WORKS·Filed 2005·Granted Dec 16, 2008·24 cites·16 claims
- 0281USD602154SWhole face covering maskSHIGEMATSU WORKS·Filed 2008·Granted Oct 13, 2009·31 cites·1 claims
- 0374US7086400B2MaskSHIGEMATSU WORKS·Filed 2003·Granted Aug 8, 2006·28 cites·1 claims
- 0471US10576313B2Detachable connectorSHIGEMATSU WORKS·Filed 2016·Granted Mar 3, 2020·2 cites·4 claims
- 0569US4752974AAir-feed type dust protective helmetSHIGEMATSU WORKS·Filed 1986·Granted Jun 28, 1988·49 cites·1 claims
- 0662US4501272AMaskSHIGEMATSU WORKS·Filed 1982·Granted Feb 26, 1985·33 cites·5 claims
- 0752US2016271429A1Breathing apparatusSHIGEMATSU WORKS·Filed 2014·Application pending·0 cites
- 0851US12036428B2Positive pressure exhale valve for a breathing apparatusSHIGEMATSU WORKS·Filed 2018·Granted Jul 16, 2024·0 cites·11 claims
- 0951US2021213309A1Facepiece and Breathing ApparatusSHIGEMATSU WORKS·Filed 2019·Application pending·0 cites
- 1050US4748695AFace shield assemblySHIGEMATSU WORKS·Filed 1986·Granted Jun 7, 1988·20 cites·5 claims
- 1143US2019046817A1Full face piece of a breathing apparatusSHIGEMATSU WORKS·Filed 2016·Application pending·0 cites
- 1242US11433205B2Breathing apparatus provided with a breath-synchronized motor fanSHIGEMATSU WORKS·Filed 2017·Granted Sep 6, 2022·0 cites·1 claims
- 1335US2016236016A1Breathing apparatusSHIGEMATSU WORKS·Filed 2015·Application pending·0 cites
- 1433US4991577AExhalation valve means of a respiration maskSHIGEMATSU WORKS·Filed 1988·Granted Feb 12, 1991·8 cites·6 claims
- 1528US4892094APressure responsive diaphragm valveSHIGEMATSU WORKS·Filed 1988·Granted Jan 9, 1990·3 cites·6 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →