NL30220C - - Google Patents

Info

Publication number: NL30220C
Authority: NL; Netherlands

Application number

Priority date (The priority date 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 date listed.)

1928-12-15

Publication of NL30220C publication Critical patent/NL30220C/xx

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)

NL30220D 1928-12-15 NL30220C (de)

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 (de)

Family

ID=7514778

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL30220D NL30220C (de)	1928-12-15

Country Status (4)

Country	Link
CH (1)	CH146137A (de)
DE (1)	DE659819C (de)
FR (1)	FR686538A (de)
NL (1)	NL30220C (de)

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
FR686538A (fr)	1930-07-28
DE659819C (de)	1938-05-11
CH146137A (de)	1931-03-31

Publication	Publication Date	Title
FR648351A (de)	1928-12-08
FR636208A (de)	1928-04-04
FR632860A (de)	1928-01-16
FR632788A (de)	1928-01-14
FR632721A (de)	1928-01-14
BE348858A (de)
BE346330A (de)
NL32643C (de)
BE348804A (de)
NL29122C (de)
NL28943C (de)	1933-02-15
NL28298C (de)
NL26040C (de)
BE358206A (de)
BE358157A (de)
BE349426A (de)
BE349412A (de)
BE349374A (de)
BE349305A (de)
BE349288A (de)
BE349190A (de)	1928-03-31
BE349037A (de)
BE348725A (de)
BE348889A (de)
BE348549A (de)