Wien
Austria
5
2020-03-12
The entities that hold a legal rights for patent applications filed by inventor Perkmann Michael:
Michael Perkmann from Wien, AT has applied for patents for these inventions. The list has both pending applications and granted patents:
In-ear active noise-cancelling earphone
#2 | 2014-12-04Plug earphone or a concha earphone
#3 | 2013-11-28Earphone with active suppression of ambient noise
#4 | 2013-01-31Noise reducing sound reproduction system
#5 | 2011-08-25Active noise reduction system
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