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 (xx)

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 (xx)

Family

ID=7514778

Family Applications (1)

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

Country Status (4)

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

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

Publication	Publication Date	Title
FR648351A (xx)	1928-12-08
FR636208A (xx)	1928-04-04
FR632860A (xx)	1928-01-16
FR632788A (xx)	1928-01-14
FR632721A (xx)	1928-01-14
BE347852A (xx)	1928-01-17
BE349412A (xx)
BE348805A (xx)
BE347600A (xx)
BE348803A (xx)
BE348725A (xx)
BE348635A (xx)
BE348620A (xx)
BE348572A (xx)	1928-03-31
BE348549A (xx)
BE348421A (xx)
BE348364A (xx)
BE348157A (xx)
BE348105A (xx)
BE348101A (xx)
BE348057A (xx)
BE346414A (xx)
BE347916A (xx)
NL29122C (xx)
BE347774A (xx)