Amazon Technologies, Inc.

Patrick Rubin

David Bruce McCalib, Jr

Christopher Raymond Grajewski

Tak Keung Joseph Lui

Oleg Kantor

Alton Paul Werronen

Roman Shmulevich

Joshua David Landry

Fabien Lepoutre

Mark G McDonald

A method of interrogating a plurality of RFID tags comprises interrogating a first RFID tag with a read command comprising a masking value for a predefined portion of a User Memory Bank of the first RFID tag. The predefined portion stores state information for the first RFID tag. The masking value corresponds to a non-quiesced state relative to the read command interrogation. The method further comprises receiving a response from the first RFID tag that indicates that the first RFID tag is in the non-quiesced state. The method further comprises interrogating the first RFID tag with a write command that instructs the first RFID tag to write a predefined value to the predefined portion of the User Memory Bank, wherein writing the predefined value to the predefined portion places the first RFID tag in a quiesced state relative to a subsequent read command interrogation comprising the masking value.

Dynamic RFID tag singulation using state information masking

Growing community of inventors

San Jose, CA, United States of America

Patrick Rubin