Copyright notice from standard xc/fonts/bdf/75dpi/{cour,helv,tim}*.bdf:

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Copyright 1984-1989, 1994 Adobe Systems Incorporated.
Copyright 1988, 1994 Digital Equipment Corporation.

Adobe is a trademark of Adobe Systems Incorporated which may be
registered in certain jurisdictions.
Permission to use these trademarks is hereby granted only in
association with the images described in this file.

Permission to use, copy, modify, distribute and sell this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notices appear in all
copies and that both those copyright notices and this permission
notice appear in supporting documentation, and that the names of
Adobe Systems and Digital Equipment Corporation not be used in
advertising or publicity pertaining to distribution of the software
without specific, written prior permission.  Adobe Systems and
Digital Equipment Corporation make no representations about the
suitability of this software for any purpose.  It is provided "as
is" without express or implied warranty.
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Notices from Helvetica and Times fonts, respectively:

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Helvetica is a trademark of Linotype-Hell AG and/or its subsidiaries.
Times is a trademark of Linotype-Hell AG and/or its subsidiaries.
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