BE807626A - Koolmicrofoon - Google Patents
KoolmicrofoonInfo
- Publication number
- BE807626A BE807626A BE2053233A BE2053233A BE807626A BE 807626 A BE807626 A BE 807626A BE 2053233 A BE2053233 A BE 2053233A BE 2053233 A BE2053233 A BE 2053233A BE 807626 A BE807626 A BE 807626A
- Authority
- BE
- Belgium
- Prior art keywords
- carbon microphone
- microphone
- carbon
- Prior art date
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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Lubricants (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Telephone Set Structure (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5431472A GB1360559A (en) | 1972-11-24 | 1972-11-24 | Carbon microphone |
Publications (1)
Publication Number | Publication Date |
---|---|
BE807626A true BE807626A (nl) | 1974-05-22 |
Family
ID=10470609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE2053233A BE807626A (nl) | 1972-11-24 | 1973-11-22 | Koolmicrofoon |
Country Status (15)
Country | Link |
---|---|
US (1) | US3859478A (nl) |
JP (1) | JPS4984430A (nl) |
AR (1) | AR199010A1 (nl) |
AT (1) | ATA982873A (nl) |
AU (1) | AU6192973A (nl) |
BE (1) | BE807626A (nl) |
BR (1) | BR7308746D0 (nl) |
CA (1) | CA995349A (nl) |
CH (1) | CH558626A (nl) |
DE (1) | DE2358243A1 (nl) |
ES (1) | ES420820A1 (nl) |
FR (1) | FR2208266B3 (nl) |
GB (1) | GB1360559A (nl) |
IT (1) | IT1001915B (nl) |
NL (1) | NL7315631A (nl) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5541570A (en) * | 1994-12-09 | 1996-07-30 | Force Imaging Technologies, Inc. | Force sensing ink, method of making same and improved force sensor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US486244A (en) * | 1892-11-15 | Charles clamond | ||
US919908A (en) * | 1908-07-13 | 1909-04-27 | Harold Sheen Martin | Electrical-resistance device. |
US1086726A (en) * | 1909-03-11 | 1914-02-10 | Johan Burchardt Opsahl | Resistance unit. |
-
1972
- 1972-11-24 GB GB5431472A patent/GB1360559A/en not_active Expired
-
1973
- 1973-09-21 US US399598A patent/US3859478A/en not_active Expired - Lifetime
- 1973-10-29 AU AU61929/73A patent/AU6192973A/en not_active Expired
- 1973-11-08 BR BR8746/73A patent/BR7308746D0/pt unknown
- 1973-11-14 NL NL7315631A patent/NL7315631A/xx unknown
- 1973-11-16 CA CA186,005A patent/CA995349A/en not_active Expired
- 1973-11-20 CH CH1640273A patent/CH558626A/xx not_active IP Right Cessation
- 1973-11-22 AR AR251115A patent/AR199010A1/es active
- 1973-11-22 DE DE2358243A patent/DE2358243A1/de active Pending
- 1973-11-22 JP JP48130831A patent/JPS4984430A/ja active Pending
- 1973-11-22 IT IT31620/73A patent/IT1001915B/it active
- 1973-11-22 BE BE2053233A patent/BE807626A/nl unknown
- 1973-11-23 AT AT982873A patent/ATA982873A/de not_active Application Discontinuation
- 1973-11-23 FR FR7341721A patent/FR2208266B3/fr not_active Expired
- 1973-11-24 ES ES420820A patent/ES420820A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT1001915B (it) | 1976-04-30 |
NL7315631A (nl) | 1974-05-28 |
DE2358243A1 (de) | 1974-05-30 |
GB1360559A (en) | 1974-07-17 |
JPS4984430A (nl) | 1974-08-14 |
US3859478A (en) | 1975-01-07 |
FR2208266A1 (nl) | 1974-06-21 |
AR199010A1 (es) | 1974-07-31 |
AU6192973A (en) | 1975-05-01 |
ATA982873A (de) | 1976-05-15 |
BR7308746D0 (pt) | 1974-08-22 |
ES420820A1 (es) | 1976-04-01 |
CA995349A (en) | 1976-08-17 |
CH558626A (de) | 1975-01-31 |
FR2208266B3 (nl) | 1976-10-08 |
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