Private company
Cardkey
American access control company
Cardkey was a producer of electronic access control products and was based in Simi Valley, California. They were the first company to develop and widely distribute "Electronic Access Control Systems". The company's original readers used cards which were made from barium ferrite and worked by magnetically attracting and repelling locking/unlocking cores within the reader module mechanism.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
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Cardkey was a producer of electronic access control products and was based in Simi Valley, California. They were the first company to develop and widely distribute "Electronic Access Control Systems".2
Links
Sources
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- 1WikidataCardkey on Wikidata
- 2WikipediaCardkey on Wikipedia