NL184331B - VENTILATION ZIPPER. - Google Patents

VENTILATION ZIPPER.

Info

Publication number
NL184331B
NL184331B NLAANVRAGE8005636,A NL184331DA NL184331B NL 184331 B NL184331 B NL 184331B NL 184331D A NL184331D A NL 184331DA NL 184331 B NL184331 B NL 184331B
Authority
NL
Netherlands
Prior art keywords
zipper
ventilation
ventilation zipper
Prior art date
Application number
NLAANVRAGE8005636,A
Other languages
Dutch (nl)
Original Assignee
Yoshida Kogyo Kk
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.)
Publication of NL184331B publication Critical patent/NL184331B/en

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58Arrangements for focusing or reflecting ray or beam
    • H01J29/62Electrostatic lenses
    • H01J29/622Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
NLAANVRAGE8005636,A 1953-11-13 VENTILATION ZIPPER. NL184331B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE331020X 1953-11-13

Publications (1)

Publication Number Publication Date
NL184331B true NL184331B (en)

Family

ID=6194185

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE8005636,A NL184331B (en) 1953-11-13 VENTILATION ZIPPER.

Country Status (5)

Country Link
BE (1) BE532870A (en)
CH (1) CH331020A (en)
FR (1) FR1147028A (en)
GB (1) GB798257A (en)
NL (1) NL184331B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940003242Y1 (en) * 1991-07-10 1994-05-16 삼성전관 주식회사 Cathode-ray tube
US6683414B2 (en) * 2001-10-25 2004-01-27 Northrop Grumman Corporation Ion-shielded focusing method for high-density electron beams generated by planar cold cathode electron emitters

Also Published As

Publication number Publication date
FR1147028A (en) 1957-11-18
CH331020A (en) 1958-06-30
GB798257A (en) 1958-07-16
BE532870A (en)

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