BE424391A - - Google Patents

Info

Publication number: BE424391A
Authority: BE; Belgium

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.)

1936-11-04

Publication of BE424391A publication Critical patent/BE424391A/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
- H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Burglar Alarm Systems (AREA)
Buildings Adapted To Withstand Abnormal External Influences (AREA)

BE424391D 1936-11-04 BE424391A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB30013/36A GB484307A (en)	1936-11-04	1936-11-04	Improvements in automatic burglar and fire alarms

Publications (1)

Publication Number	Publication Date
BE424391A true BE424391A (xx)

Family

ID=10300856

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE424391D BE424391A (xx)	1936-11-04

Country Status (4)

Country	Link
US (1)	US2161526A (xx)
BE (1)	BE424391A (xx)
FR (1)	FR828568A (xx)
GB (1)	GB484307A (xx)

0
- BE BE424391D patent/BE424391A/xx unknown
1936
- 1936-11-04 GB GB30013/36A patent/GB484307A/en not_active Expired
1937
- 1937-10-30 FR FR828568D patent/FR828568A/fr not_active Expired
- 1937-11-02 US US172462A patent/US2161526A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
FR828568A (fr)	1938-05-20
GB484307A (en)	1938-05-04
US2161526A (en)	1939-06-06

Publication	Publication Date	Title
FR834156A (xx)	1938-11-15
FR49591E (xx)	1939-05-11
BE415900A (xx)	1936-07-31
BE416030A (xx)	1936-07-31
BE414636A (xx)	1936-04-30
NL50597C (xx)
NL49352C (xx)	1940-10-15
NL47786C (xx)
NL46909C (xx)
BE424391A (xx)
NL45766C (xx)
NL52598C (xx)
NL50114C (xx)
BE424912A (xx)
BE424219A (xx)	1937-11-30
BE423858A (xx)
BE423646A (xx)	1937-10-30
BE420278A (xx)
BE416321A (xx)
BE416312A (xx)
BE416290A (xx)
BE416271A (xx)
BE416111A (xx)
BE415557A (xx)
BE415974A (xx)