Method for making an ear plug
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United States of America Patent
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-
Feb 8, 1983
Issued Date -
N/A
app pub date -
Mar 27, 1981
filing date -
Jul 7, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method for making a coded, resilient ear plug including forming an impression with wax and release agent, investing the impression, agitating to remove air, hardening the investment and after removal of the impression material casting a hardenable material in the investment cavity.
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