NL34614C - - Google Patents

Info

Publication number: NL34614C
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.)

1930-03-21

Publication of NL34614C publication Critical patent/NL34614C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/023—Circuit arrangements

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Computer Security & Cryptography (AREA)
Signal Processing (AREA)
Interface Circuits In Exchanges (AREA)

NL34614D 1930-03-21 NL34614C (en:Method)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE355181X		1930-03-21

Publications (1)

Publication Number	Publication Date
NL34614C true NL34614C (en:Method)

Family

ID=20308758

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL34614D NL34614C (en:Method)	1930-03-21

Country Status (6)

Country	Link
US (1)	US1855087A (en:Method)
BE (1)	BE378410A (en:Method)
DE (1)	DE583068C (en:Method)
FR (1)	FR713494A (en:Method)
GB (1)	GB355181A (en:Method)
NL (1)	NL34614C (en:Method)

0
- BE BE378410D patent/BE378410A/xx unknown
- NL NL34614D patent/NL34614C/xx active
1931
- 1931-03-13 US US522461A patent/US1855087A/en not_active Expired - Lifetime
- 1931-03-18 FR FR713494D patent/FR713494A/fr not_active Expired
- 1931-03-19 DE DET38565D patent/DE583068C/de not_active Expired
- 1931-03-19 GB GB8512/31A patent/GB355181A/en not_active Expired

Also Published As

Publication number	Publication date
US1855087A (en)	1932-04-19
GB355181A (en)	1931-08-20
FR713494A (fr)	1931-10-28
DE583068C (de)	1933-08-28
BE378410A (en:Method)

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