NL66226C - - Google Patents

Info

Publication number: NL66226C
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.)

1942-03-12

Publication of NL66226C publication Critical patent/NL66226C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/025—Door telephones
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)

NL66226D 1942-03-12 NL66226C (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US434339A US2345046A (en)	1942-03-12	1942-03-12	Intercommunicating system

Publications (1)

Publication Number	Publication Date
NL66226C true NL66226C (enrdf_load_html_response)

Family

ID=23723823

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL66226D NL66226C (enrdf_load_html_response)	1942-03-12

Country Status (4)

Country	Link
US (1)	US2345046A (enrdf_load_html_response)
BE (1)	BE467440A (enrdf_load_html_response)
FR (1)	FR938320A (enrdf_load_html_response)
NL (1)	NL66226C (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB597170A (en) *	1945-03-29	1948-01-20	Philips Nv	Improvements in loud-speaking telephone arrangements

0
- NL NL66226D patent/NL66226C/xx active
- BE BE467440D patent/BE467440A/xx unknown
1942
- 1942-03-12 US US434339A patent/US2345046A/en not_active Expired - Lifetime
1946
- 1946-08-19 FR FR938320D patent/FR938320A/fr not_active Expired

Also Published As

Publication number	Publication date
BE467440A (enrdf_load_html_response)
FR938320A (fr)	1948-09-10
US2345046A (en)	1944-03-28

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