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
GB757441A
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.)
Koninklijke Philips NV
Original Assignee
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 Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Priority to GB757441ApriorityCriticalpatent/GB550104A/en
Publication of GB550104ApublicationCriticalpatent/GB550104A/en
550,104. Thermionic valves. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). June 14, 1941, No. 7574. Drawings to Specification. [Class 39 (i)] The subject-matter of this Specification is identical with that of Specification 617,187, [Group XL (a)]
GB757441A1941-06-141941-06-14Improvement in electric discharge tubes and circuit arrangements therefor
ExpiredGB550104A
(en)