The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1985
Filed:
Jun. 29, 1982
Masatoshi Sugie, Zama, JP;
Ricoh Company, Ltd., , JP;
Abstract
In a facsimile communication method capable of preventing receipt of an echo of data being transmitted, a preamble-preceded frame is used as a data to be transmitted, and the frame is allowed to be received only when its preceding preamble has been received. For this purpose, the total time length of the preamble-preceded frame being transmitted is monitored. If it is shorter than a predetermined time length, a number of flags as required are added to the end of preamble-preceded frame, thereby ensuring that the total time length of transmitting the data is always longer than the predetermined time length. In this manner, it is ensured that an echo of data being transmitted returns only while transmission of the data is in progress and is thus not received.