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
GB1323141A
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 GB1323141ApriorityCriticalpatent/GB549275A/en
Publication of GB549275ApublicationCriticalpatent/GB549275A/en
H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
H01J19/02—Electron-emitting electrodes; Cathodes
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2893/00—Discharge tubes and lamps
H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
Landscapes
Management, Administration, Business Operations System, And Electronic Commerce
(AREA)
Loading And Unloading Of Fuel Tanks Or Ships
(AREA)
Abstract
549,275. Thermionic valves. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 14, 1941, No. 13231. Drawings to Specification. [Class 39 (i)] The subject-matter of this Specification is identical with that of Specification 603,938, [Group XL(a)].
GB1323141A1941-10-141941-10-14Improvements in or relating to electric discharge tubes
ExpiredGB549275A
(en)