06232870 is referenced by 312 patents and cites 167 patents.

The present invention relates to RFID devices, including handheld RFID devices, and applications for such devices. The devices and applications may be used in connection with items that are associated with an RFID tag, and optionally a magnetic security element. The devices and applications are described with particular reference to library materials such as books, periodicals, and magnetic and optical media.

Title
Applications for radio frequency identification systems
Application Number
9/368826
Publication Number
6232870 (B1)
Application Date
August 5, 1999
Publication Date
May 15, 2001
Inventor
John D Yorkovich
Maplewood
MN, US
Chester Piotrowski
White Bear Lake
MN, US
James E Nash
Bloomington
MN, US
Richard W Lindahl
Oakdale
MN, US
John M Kruse
Minneapolis
MN, US
Gerald L Karel
Maplewood
MN, US
Richard H Jackson
Inver Grove Heights
MN, US
Mitchell B Grunes
Minneapolis
MN, US
Bernard A Gonzalez
St. Paul
MN, US
Sharon R Garber
Crystal
MN, US
Agent
Peter L Olson
US
Assignee
3M Innovative Properties Company
MN, US
IPC
H04Q 5/22
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