BE490715A - - Google Patents
Info
- Publication number
- BE490715A BE490715A BE490715DA BE490715A BE 490715 A BE490715 A BE 490715A BE 490715D A BE490715D A BE 490715DA BE 490715 A BE490715 A BE 490715A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D99/00—Subject matter not provided for in other groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US700233XA | 1948-08-19 | 1948-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE490715A true BE490715A (enrdf_load_html_response) |
Family
ID=22092640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE490715D BE490715A (enrdf_load_html_response) | 1948-08-19 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE490715A (enrdf_load_html_response) |
| CH (1) | CH275854A (enrdf_load_html_response) |
| DE (1) | DE815493C (enrdf_load_html_response) |
| FR (1) | FR992051A (enrdf_load_html_response) |
| GB (1) | GB700233A (enrdf_load_html_response) |
| NL (1) | NL73417C (enrdf_load_html_response) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE949360C (de) * | 1952-01-11 | 1956-09-20 | Patra Patent Treuhand | Elektrische Gasentladungslampe, insbesondere Leuchtstofflampe |
| DE1246897B (de) * | 1959-09-09 | 1967-08-10 | Itt Ind Ges Mit Beschraenkter | Elektronische Festkoerperanordnung |
| NL267357A (enrdf_load_html_response) * | 1960-07-28 | |||
| GB1051550A (enrdf_load_html_response) * | 1963-09-19 | |||
| DE1239871B (de) * | 1963-12-09 | 1967-05-03 | Siemens Ag | Druckempfindliche Halbleiteranordnung |
| DE1245425B (de) * | 1965-06-23 | 1967-07-27 | Telefunken Patent | Elektromechanischer Wandler mit mechanisch empfindlichem Halbleiterbauelement |
-
0
- NL NL73417D patent/NL73417C/xx active
- BE BE490715D patent/BE490715A/xx unknown
-
1949
- 1949-07-31 DE DEP50636A patent/DE815493C/de not_active Expired
- 1949-08-09 FR FR992051D patent/FR992051A/fr not_active Expired
- 1949-08-12 GB GB21022/49A patent/GB700233A/en not_active Expired
- 1949-08-20 CH CH275854D patent/CH275854A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE815493C (de) | 1951-11-19 |
| NL73417C (enrdf_load_html_response) | |
| GB700233A (en) | 1953-11-25 |
| FR992051A (fr) | 1951-10-15 |
| CH275854A (de) | 1951-06-15 |