NL30220C - - Google Patents
Info
- Publication number
- NL30220C NL30220C NL30220DA NL30220C NL 30220 C NL30220 C NL 30220C NL 30220D A NL30220D A NL 30220DA NL 30220 C NL30220 C NL 30220C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/007—Telephonic communication systems specially adapted for combination with other electrical systems with remote control systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Automation & Control Theory (AREA)
- Alarm Systems (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES88951D DE659819C (de) | 1928-12-15 | 1928-12-15 | Schaltungsanordnung fuer Alarmanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL30220C true NL30220C (it) |
Family
ID=7514778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL30220D NL30220C (it) | 1928-12-15 |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH146137A (it) |
| DE (1) | DE659819C (it) |
| FR (1) | FR686538A (it) |
| NL (1) | NL30220C (it) |
-
0
- NL NL30220D patent/NL30220C/xx active
-
1928
- 1928-12-15 DE DES88951D patent/DE659819C/de not_active Expired
-
1929
- 1929-12-02 CH CH146137D patent/CH146137A/de unknown
- 1929-12-10 FR FR686538D patent/FR686538A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE659819C (de) | 1938-05-11 |
| CH146137A (de) | 1931-03-31 |
| FR686538A (fr) | 1930-07-28 |