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
GB1078241A
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 GB1078241ApriorityCriticalpatent/GB550728A/en
Publication of GB550728ApublicationCriticalpatent/GB550728A/en
550,728. Electrode materials. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Aug. 23, 1941, No. 10782. [Class 39 (i)] The subject-matter of this Specification is identical with that of Specification 605,852, [Group XL (a)].
GB1078241A1941-08-231941-08-23Improvements in or relating to pentode or like electron discharge tubes having suppressor grids
ExpiredGB550728A
(en)
Improvements in or relating to devices of the kind comprising a discharge tube in which the electrons are concentrated in a beam and traverse a velocity control space