21
/
en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
89072
8199
2

nov 1, 1984 - •FDA approval granted to 3M •FDA Says multi-channel theoretically better

Added to timeline:

30 Sep 2017
0
0
149
C.I. implants

Date:

nov 1, 1984
Now
~ 34 years ago
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