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:
Apr. 10, 2007
Filed:
Jun. 17, 2002
James F. Collum, Forest, VA (US);
William Oscar Janky, Goode, VA (US);
Eugene H. Peterson, Iii, Forest, VA (US);
Dennis Maddox, Rustburg, VA (US);
James F. Collum, Forest, VA (US);
William Oscar Janky, Goode, VA (US);
Eugene H. Peterson, III, Forest, VA (US);
Dennis Maddox, Rustburg, VA (US);
M/A-COM Private Radio Systems, Inc., Lynchburg, VA (US);
Abstract
A security system for a digital trunked radio system having a digital control channel and a plurality of working channels, wherein said working channels are assigned for temporary use of individual radio units by digital control signals transmitted over said control channel, said control channel carrying digital control signals between a base site and said radio units, comprising a digital key, said key used to limit access to the system equipment and system control channel transmissions.