BE435104A - - Google Patents
Info
- Publication number
- BE435104A BE435104A BE435104DA BE435104A BE 435104 A BE435104 A BE 435104A BE 435104D A BE435104D A BE 435104DA BE 435104 A BE435104 A BE 435104A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
- H04J1/045—Filters applied to frequency transposition
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE210931X | 1938-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE435104A true BE435104A (en:Method) |
Family
ID=5799978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE435104D BE435104A (en:Method) | 1938-07-01 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2266496A (en:Method) |
| BE (1) | BE435104A (en:Method) |
| CH (1) | CH210931A (en:Method) |
| FR (1) | FR856911A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2874356A (en) * | 1948-06-28 | 1959-02-17 | Phillips Petroleum Co | Method of and apparatus for seismic prospecting |
| US2700753A (en) * | 1948-06-28 | 1955-01-25 | Phillips Petroleum Co | Method of and apparatus for seismic prospecting |
-
0
- BE BE435104D patent/BE435104A/xx unknown
-
1939
- 1939-06-16 CH CH210931D patent/CH210931A/de unknown
- 1939-06-23 US US280715A patent/US2266496A/en not_active Expired - Lifetime
- 1939-06-26 FR FR856911D patent/FR856911A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2266496A (en) | 1941-12-16 |
| CH210931A (de) | 1940-08-15 |
| FR856911A (fr) | 1940-08-16 |