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:
Mar. 02, 2010
Filed:
Feb. 22, 2005
Peter Furlong, Dublin, IE;
Eoghan Stack, Ballyvolane, IE;
David John Law, Musselburgh, GB;
Hana Hailichova, Dublin, IE;
Peter Furlong, Dublin, IE;
Eoghan Stack, Ballyvolane, IE;
David John Law, Musselburgh, GB;
Hana Hailichova, Dublin, IE;
3Com Corporation, Marlborough, MA (US);
Abstract
A deterministic finite state machine is operated to detect any one of a plurality of digital signatures each corresponding to a succession of characters and each defined by a sequence of states in the state machine. The machine is organized such that for each state after the first in any sequence there are not more than two allowed exit transitions of which one is to a default state. Input characters are examined to determine a transition from a current state of the machine to a next state. When the machine responds to an input character to perform a transition to the default state, the input character is re-examined to determine the next state of the state machine. The reduction in transitions saves considerable space in memory.