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DK21727C - Assistive device for Headphones. - Google Patents

Assistive device for Headphones.

Info

Publication number
DK21727C
DK21727C DK21727DA DK21727C DK 21727 C DK21727 C DK 21727C DK 21727D A DK21727D A DK 21727DA DK 21727 C DK21727 C DK 21727C
Authority
DK
Denmark
Prior art keywords
headphones
assistive device
assistive
Prior art date
Application number
Other languages
Danish (da)
Inventor
Niels Aug Lilliendahl-Petersen
Frederik Christian Carl Naeser
Original Assignee
Niels Aug Lilliendahl-Petersen
Frederik Christian Carl Naeser
Publication date
Application granted granted Critical
Publication of DK21727C publication Critical patent/DK21727C/en

Links

DK21727D Assistive device for Headphones. DK21727C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK21727T

Publications (1)

Publication Number Publication Date
DK21727C true DK21727C (en) 1916-12-18

Family

ID=27836735

Family Applications (2)

Application Number Title Priority Date Filing Date
DK21727D DK21727C (en) Assistive device for Headphones.
DK22549D DK22549C (en) Assistive device for Headphones.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DK22549D DK22549C (en) Assistive device for Headphones.

Country Status (1)

Country Link
DK (2) DK22549C (en)

Also Published As

Publication number Publication date
DK22549C (en) 1917-10-29

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