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ES74182A1 - Improvements in or referring to vacuum tubes. - Google Patents

Improvements in or referring to vacuum tubes.

Info

Publication number
ES74182A1
ES74182A1 ES74182A ES74182A ES74182A1 ES 74182 A1 ES74182 A1 ES 74182A1 ES 74182 A ES74182 A ES 74182A ES 74182 A ES74182 A ES 74182A ES 74182 A1 ES74182 A1 ES 74182A1
Authority
ES
Spain
Prior art keywords
referring
vacuum tubes
tubes
vacuum
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
ES74182A
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.)
Oosterhuis Ekko
Koninklijke Philips NV
Original Assignee
Oosterhuis Ekko
Philips Gloeilampenfabrieken NV
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 Oosterhuis Ekko, Philips Gloeilampenfabrieken NV filed Critical Oosterhuis Ekko
Priority to ES74182A priority Critical patent/ES74182A1/en
Publication of ES74182A1 publication Critical patent/ES74182A1/en
Expired legal-status Critical Current

Links

ES74182A 1920-06-22 1920-06-22 Improvements in or referring to vacuum tubes. Expired ES74182A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES74182A ES74182A1 (en) 1920-06-22 1920-06-22 Improvements in or referring to vacuum tubes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES74182A ES74182A1 (en) 1920-06-22 1920-06-22 Improvements in or referring to vacuum tubes.

Publications (1)

Publication Number Publication Date
ES74182A1 true ES74182A1 (en) 1920-09-16

Family

ID=64244503

Family Applications (1)

Application Number Title Priority Date Filing Date
ES74182A Expired ES74182A1 (en) 1920-06-22 1920-06-22 Improvements in or referring to vacuum tubes.

Country Status (1)

Country Link
ES (1) ES74182A1 (en)

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