From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <47A51AC3.6070407@proweb.co.uk>
Date: Sun,  3 Feb 2008 01:37:07 +0000
From: mattmobile@proweb.co.uk
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To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
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Subject: [9fans] Plan9 Trademark ?
Topicbox-Message-UUID: 4161b58a-ead3-11e9-9d60-3106f5b1d025

Is "Plan 9" trademarked?
IANAL but there could be a problem

http://www.plan9software.com/