Fan-Precipitator Elements Memorandum
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November 20, 1969
Copyrighted © by The Townsend Brown family. All rights reserved.
From: T. Townsend Brown
Subject: Patent coverage for semi-conducting fan-precipitator elements.
1. Recent laboratory findings have established the value of semi-conducting
materials in the fabrication of electrode vanes for both the
fan-precipitators and loudspeakers. Air velocities and sound intensities
have been increased three to four times over those heretofore possible with
bare metallic electrodes.
2. In short, the specific use of semi-conductors represents a substantial
"break-through" in electrokinetic technology and leads to valuable
structural improvements which appear to be novel and patentable.
3. Foreseeing such possibility, I prepared a first draft of patent
application "Electrokinetic Apparatus" dated Nov. 10, 1967, Enclosure (A)
and submitted it to our patent counsel during a conference on the subject,
November 14, 1967.
4. During that conference, Mr. K. made a provisional review of the new
material and expressed the opinion, subject to further study, that
semi-conducting materials used in the indicated way would be patentable.
Such a basic structural departure could provide independent proprietary
rights if claimed specifically.
5. Mr. K. has now completed his review (See Enclosure B) and is
prepared to proceed with the filing of subject application.
6. I recommend that I be authorized to instruct Mr. K.:
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