1
Clark IV William A, Salmond Kent A, Stafford Thomas S: Method and means for generating compressed keys. International Business Machines Corporation, July 13, 1971: US3593309 (18 worldwide citation)

Electronically compressing a sorted sequence of uncompressed keys, each having an associated pointer address for accessing the information represented by the key. Compression is by electronic transfer of the remaining part of any key after removing some or all of (1) high-order 'factored' bytes, and ...


2
Clark IV William A, Salmond Kent A, Stafford Thomas S: Method and means for searching a compressed index. International Business Machines Corporation, March 21, 1972: US3651483 (18 worldwide citation)

Electronically searching a Compressed Index for a representation of a search argument (SA). The index comprises a sequence of compressed keys (CK's) generated with the method in patent application Ser. No. 788,807, in which the sequence of compressed keys represents a sorted sequence of uncompressed ...