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| 1953 | Founded |
| 1960 | Moved to purpose-built factory in Linton |
| 1971 | Major extension |
| 1973 | Opened Wisbeach feeder factory |
| 1976 | Pye purchased by Philips |
| 1981 | Transferred from Pye to CEI |
| 1988 | Closed main production |
| 1989 | Closed all operations* |
| * For a short while there was a residue of operations within Newmarket Microsystems run by Ian Lines. Cathodeon Crystals Limited was dissolved in 1992 according to Companies House (Company No. 00525339). |
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