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Application filed by Χριστος ΠασσαςfiledCriticalΧριστος Πασσας
Priority to GR510112955ApriorityCriticalpatent/GR12955B/en
Publication of GR12955BpublicationCriticalpatent/GR12955B/en
GR510112955A1951-04-121951-04-12
LETTER PAPER METHOD METHOD IN ORDER TO ABSOLUTELY ENSURE THE CONFIDENTIALITY OF NON-USE ENVELOPE LETTERS.
GR12955B
(en)