FR696980A - Coupling arrangement for telephone systems - Google Patents
Coupling arrangement for telephone systemsInfo
- Publication number
- FR696980A FR696980A FR696980DA FR696980A FR 696980 A FR696980 A FR 696980A FR 696980D A FR696980D A FR 696980DA FR 696980 A FR696980 A FR 696980A
- Authority
- FR
- France
- Prior art keywords
- coupling arrangement
- telephone systems
- telephone
- systems
- coupling
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/40—Colouring or decolouring of foods
- A23L5/42—Addition of dyes or pigments, e.g. in combination with optical brighteners
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE696980X | 1929-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR696980A true FR696980A (en) | 1931-01-10 |
Family
ID=6607817
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR696980D Expired FR696980A (en) | 1929-05-18 | 1930-05-17 | Coupling arrangement for telephone systems |
FR39382D Expired FR39382E (en) | 1929-05-18 | 1930-10-13 | Coupling arrangement for telephone systems |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR39382D Expired FR39382E (en) | 1929-05-18 | 1930-10-13 | Coupling arrangement for telephone systems |
Country Status (3)
Country | Link |
---|---|
DE (2) | DE624051C (en) |
FR (2) | FR696980A (en) |
NL (2) | NL32889C (en) |
-
0
- NL NL51701D patent/NL51701C/xx active
- NL NL32889D patent/NL32889C/xx active
-
1929
- 1929-05-18 DE DES91776D patent/DE624051C/en not_active Expired
-
1930
- 1930-05-17 FR FR696980D patent/FR696980A/en not_active Expired
- 1930-10-13 FR FR39382D patent/FR39382E/en not_active Expired
- 1930-12-09 DE DE1930625010D patent/DE625010C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE624051C (en) | 1936-01-15 |
DE625010C (en) | 1936-02-01 |
FR39382E (en) | 1931-10-19 |
NL32889C (en) | |
NL51701C (en) |
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