ES122981A1 - Improvements in acoustic devices. - Google Patents

Improvements in acoustic devices.

Info

Publication number
ES122981A1
ES122981A1 ES122981A ES122981A ES122981A1 ES 122981 A1 ES122981 A1 ES 122981A1 ES 122981 A ES122981 A ES 122981A ES 122981 A ES122981 A ES 122981A ES 122981 A1 ES122981 A1 ES 122981A1
Authority
ES
Spain
Prior art keywords
acoustic devices
acoustic
devices
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
ES122981A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Priority to ES122981A priority Critical patent/ES122981A1/en
Publication of ES122981A1 publication Critical patent/ES122981A1/en
Expired legal-status Critical Current

Links

ES122981A 1931-05-13 1931-05-13 Improvements in acoustic devices. Expired ES122981A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES122981A ES122981A1 (en) 1931-05-13 1931-05-13 Improvements in acoustic devices.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES122981A ES122981A1 (en) 1931-05-13 1931-05-13 Improvements in acoustic devices.

Publications (1)

Publication Number Publication Date
ES122981A1 true ES122981A1 (en) 1941-06-16

Family

ID=65580705

Family Applications (1)

Application Number Title Priority Date Filing Date
ES122981A Expired ES122981A1 (en) 1931-05-13 1931-05-13 Improvements in acoustic devices.

Country Status (1)

Country Link
ES (1) ES122981A1 (en)

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