Vial and method of making same

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive

Reexamination Certificate

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Details

C033S381000, C033S377000, C033S037000

Reexamination Certificate

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06912793

ABSTRACT:
A vial having an outer wall which is straight and cylindrical and a curved inner cavity. The inner cavity is curved in a substantially uniform arc. The apex of the curved cavity is closer to the cylindrical outer wall of the vial than the ends of the inner cavity. The inner cavity is substantially uniform in cross section throughout its length.

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