- US
266848 D - ZX 80 COMPUTER
- Rick Dickinson's design for the
first in the ZX range.
- US
272349 D - ZX 81 COMPUTER
- Rick Dickinson's award-winning
design for the successor.
- WO
8303916A1 - ZX Spectrum Screen
- Richard Francis Altwasser's
patent for attribute clash.
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- Fig.
1.
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2.
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3.
- Fig.
4.
- Fig.
5A-1.
- Fig.
5A-2.
- Fig.
5B.
- Fig.
5D.
- Fig.
5B.
-
International Search Report.
-
Annex.
- EP
107687 B1 - Amstrad's full grant for newly acquired
invention.
- Richard was working for Alan in
1988, but on Satellite receivers.
- EP
059556 A2 - ZX PRINTER
- David Southward's ingenious
printing device for ZX81 and Spectrum.
- Family Members: US 4460908
A
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1.
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- Fig.
1,2,3.
- Fig.
4.
- Fig.
5.
- GB 2119207 A
- The Spectrum's Beeper
- Richard's 1983 patent for the
Spectrum's loudspeaker.
- US 6333721 B1
- Identification Element
- A Yuletide patent.
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