The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2021
Filed:
Jan. 09, 2020
Setra Systems, Inc., Boxborough, MA (US);
Fran Nutter, Charlton, MA (US);
G. Michael Soper, Scarborough, MA (US);
Justin DeSilva, Mendon, MA (US);
Sunil Barot, Nashua, NH (US);
SETRA SYSTEMS, INC., Boxborough, MA (US);
Abstract
An apparatus, having: a pressure differential sensor apparatus () configured to detect a pressure difference between two locations; a faceplate () having a base () and a protrusion () from the base, the protrusion comprising a light-transmissive perimeter () configured to transmit light forward and laterally; and a circuit board () having an indicator light () mounted thereon and configured to emit light into the light-transmissive perimeter, the indicator light further configured to emit a first color under first pressure difference conditions and a second color under second pressure difference conditions.