Digital data filter for local area network

Details Digital data filter for local area network Digital data filter for local area network

1985-11-14

1988-06-28

Harkcom, Gary V.

Boots, shoes, and leggings

3401462, G06F 738

Patent

active

047544201

ABSTRACT:
An apparatus for digital filtering of sequences of data units, such as sequences of bytes. The apparatus uses parallel application of more than one filter and stores the results of applying all filters to a whole sequence of data units. The apparatus involves the interaction of random access memories. Hence, filters are programmable. In addition, individual data units in a sequence may be trapped for comparison solely as a function of their ordinal position in the sequence.

REFERENCES:
patent: 3849762 (1974-11-01), Fujimoto et al.
patent: 3881101 (1975-04-01), Pederson et al.
patent: 4053871 (1977-10-01), Vidalin et al.
patent: 4443860 (1984-04-01), Vidalin
patent: 4524427 (1985-06-01), Vidalin et al.
patent: 4525803 (1985-06-01), Vidalin et al.
patent: 4575864 (1986-03-01), Rice, Jr. et al.

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