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ES69782A1 - Improvements in sound wave concentrators for sound transmission apparatus. - Google Patents

Improvements in sound wave concentrators for sound transmission apparatus.

Info

Publication number
ES69782A1
ES69782A1 ES69782A ES69782A ES69782A1 ES 69782 A1 ES69782 A1 ES 69782A1 ES 69782 A ES69782 A ES 69782A ES 69782 A ES69782 A ES 69782A ES 69782 A1 ES69782 A1 ES 69782A1
Authority
ES
Spain
Prior art keywords
sound
transmission apparatus
sound wave
wave concentrators
concentrators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES69782A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to ES69782A priority Critical patent/ES69782A1/en
Publication of ES69782A1 publication Critical patent/ES69782A1/en
Expired legal-status Critical Current

Links

ES69782A 1919-05-14 1919-05-14 Improvements in sound wave concentrators for sound transmission apparatus. Expired ES69782A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES69782A ES69782A1 (en) 1919-05-14 1919-05-14 Improvements in sound wave concentrators for sound transmission apparatus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES69782A ES69782A1 (en) 1919-05-14 1919-05-14 Improvements in sound wave concentrators for sound transmission apparatus.

Publications (1)

Publication Number Publication Date
ES69782A1 true ES69782A1 (en) 1919-06-01

Family

ID=64240914

Family Applications (1)

Application Number Title Priority Date Filing Date
ES69782A Expired ES69782A1 (en) 1919-05-14 1919-05-14 Improvements in sound wave concentrators for sound transmission apparatus.

Country Status (1)

Country Link
ES (1) ES69782A1 (en)

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