Appeal No. 2002-1527 Page 13
Application No. 08/885,817
Zletz, 893 F.2d 319, 321, 13 USPQ2d 1320, 1322 (Fed. Cir. 1989)). Here, claim 5
recites in pertinent part the following limitations: "a private multicast address space."
Contrary to the appellants' argument, the claim does not require "separate address
spaces for private and public multicasts. . . ." (Supp. Appeal Br. at 7.) Giving the claim
its broadest, reasonable construction, the limitations merely specify an address space
for a private multicast.
2. Anticipation Determination
We find that Aziz discloses an address space for a private multicast. As
aforementioned, "[w]hen secure multicasting to a multicast address M is required, a
group membership creation primitive will establish . . . the membership list of addresses
that are allowed to transmit and receive encrypted multicast datagrams to and from
group address M." Col. 14, ll. 11-17. The membership list of addresses constitutes an
address space for participating in a private multicast by transmitting and receiving
encrypted multicast datagrams to and from group address M. Therefore, we affirm the
rejection of claim 5.
E. CLAIMS 6, 21, 30, AND 31
Admitting that "Aziz . . . does not explicitly disclose using a bit-mask to indicate
groups of senders permitted to communicate with or not communicate with the
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