FR627296A - Perfectionnements apportés aux postes téléphoniques, notamment à ceux pour établissements publics, cafés, restaurants, etc.
- Google Patents
Perfectionnements apportés aux postes téléphoniques, notamment à ceux pour établissements publics, cafés, restaurants, etc.
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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
H04M17/026—Constructional features
Landscapes
Engineering & Computer Science
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Computer Networks & Wireless Communication
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Computer Security & Cryptography
(AREA)
Signal Processing
(AREA)
FR627296D1926-01-091927-01-08Perfectionnements apportés aux postes téléphoniques, notamment à ceux pour établissements publics, cafés, restaurants, etc.
ExpiredFR627296A
(fr)