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US patent 5473599
- Subject: US patent 5473599
- From: nick at foobar.org (Nick Hilliard)
- Date: Tue, 22 Apr 2014 10:26:07 +0200
... turns 20 today.
This is the patent which covers hsrp, vrrp, many applications of carp and
some other vendor-specific standby protocols. Assuming no term
adjustments, 20 years is the normal term for US patents so unless there's
been any adjustments / continuations, probably this patent is now expired.
More details on: https://www.google.com/patents/US5473599
Nick