NL146431B - KEYBOARD WITH KEYS MADE OF TRANSLUCENT MATERIAL. - Google Patents
KEYBOARD WITH KEYS MADE OF TRANSLUCENT MATERIAL.Info
- Publication number
- NL146431B NL146431B NL676700483A NL146431DA NL146431B NL 146431 B NL146431 B NL 146431B NL 676700483 A NL676700483 A NL 676700483A NL 146431D A NL146431D A NL 146431DA NL 146431 B NL146431 B NL 146431B
- Authority
- NL
- Netherlands
- Prior art keywords
- keyboard
- translucent material
- keys made
- keys
- translucent
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
- H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
- H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL283560X | 1949-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL146431B true NL146431B (en) |
Family
ID=19782400
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL676700483A NL146431B (en) | 1949-05-13 | KEYBOARD WITH KEYS MADE OF TRANSLUCENT MATERIAL. | |
NL71310D NL71310C (en) | 1949-05-13 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL71310D NL71310C (en) | 1949-05-13 |
Country Status (7)
Country | Link |
---|---|
US (1) | US2659030A (en) |
BE (1) | BE495667A (en) |
CH (1) | CH283560A (en) |
DE (1) | DE820940C (en) |
FR (1) | FR1017426A (en) |
GB (1) | GB676914A (en) |
NL (2) | NL71310C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2313343A (en) * | 1996-05-20 | 1997-11-26 | Reuters Ltd | A keyboard having keycaps with transparent front faces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE426053C (en) * | 1926-03-08 | Siemens & Halske Akt Ges | Discharge tubes | |
US1417912A (en) * | 1916-06-24 | 1922-05-30 | Hewitt Peter Cooper | Vacuum electric apparatus |
GB344448A (en) * | 1929-12-03 | 1931-03-03 | Andre Gabriel Clavier | Improvements in or relating to thermionic oscillation generators |
US2009369A (en) * | 1931-06-24 | 1935-07-23 | Rca Corp | Oscillation generation |
DE663309C (en) * | 1934-10-30 | 1938-08-04 | Telefunken Gmbh | Short wave tubes with cathode and one-piece anode arranged concentrically to it |
US2266411A (en) * | 1938-05-27 | 1941-12-16 | Int Standard Electric Corp | Electron tube |
FR999345A (en) * | 1946-11-20 | 1952-01-29 |
-
0
- NL NL676700483A patent/NL146431B/en unknown
- NL NL71310D patent/NL71310C/xx active
- BE BE495667D patent/BE495667A/xx unknown
-
1950
- 1950-04-13 US US155575A patent/US2659030A/en not_active Expired - Lifetime
- 1950-05-10 DE DEN860A patent/DE820940C/en not_active Expired
- 1950-05-10 GB GB11638/50A patent/GB676914A/en not_active Expired
- 1950-05-11 FR FR1017426D patent/FR1017426A/en not_active Expired
- 1950-05-11 CH CH283560D patent/CH283560A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2313343A (en) * | 1996-05-20 | 1997-11-26 | Reuters Ltd | A keyboard having keycaps with transparent front faces |
Also Published As
Publication number | Publication date |
---|---|
CH283560A (en) | 1952-06-15 |
DE820940C (en) | 1951-11-15 |
BE495667A (en) | |
NL71310C (en) | |
US2659030A (en) | 1953-11-10 |
FR1017426A (en) | 1952-12-10 |
GB676914A (en) | 1952-08-06 |
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