Closure fasteners – Seals – Encasing
Patent
1978-08-02
1981-04-21
Moore, Richard E.
Closure fasteners
Seals
Encasing
B65D 3334
Patent
active
042629462
ABSTRACT:
A frangible plug for sealing the access opening of a barrel lock, particularly such a lock installed in an electric meter box lock, the plug being so designed and installed that it cannot be removed without being destroyed, thus giving positive visible indication that the integrity of the seal has or has not been violated.
REFERENCES:
patent: 1037010 (1912-08-01), Irons
patent: 1487159 (1924-03-01), Heeren
patent: 2530899 (1950-11-01), Mueller
patent: 4008914 (1977-02-01), Anderson
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