SEAL COMBINED WITH INDICATOR, SAMPLER OR INSPECTION FEATURE:
(under the class definition) Sealing means combined with other means to display, test, or examine a condition or function of the sealing means or a chamber for the sealing means.
SEE OR SEARCH CLASS
73, Measuring and Testing, for a detailed structure or method for measuring or testing,
863+, for obtaining a predetermined portion of a mass of material to be tested or subclass 865.8 for apparatus or process for sensing and signaling, or for indicating a physical condition.
