US Patent 4,087,788

Number:	4,087,788
Title:	Data compression system
Filed:	14-Jan-1977
Granted:	02-May-1978
Inventor:	Brian J. Johannesson, Waterloo CA
Assignee:	NCR Canada LTD - NCR Canada Ltee, Mississauga CA

Comment by FAQ:A data compression system is disclosed in which the left hand boundary of a character is developed in the form of a sequence of Freeman direction codes, the codes being stored in digital form within a processor.