. . . "Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3566153Apr 30, 1969Feb 23, 1971Texas Instruments IncProgrammable sequential logicUS5208748Jun 19, 1989May 4, 1993Action Technologies, Inc.Method and apparatus for structuring and managing human communications by explicitly defining the types of communications permitted between participantsUS5216603Oct 17, 1990Jun 1, 1993Action" . .