Electricity: electrical systems and devices – Miscellaneous
Patent
1985-02-25
1985-09-17
Kucia, R. R.
Electricity: electrical systems and devices
Miscellaneous
339 17LM, 339184M, 361415, H05K 114
Patent
active
045424411
ABSTRACT:
Edge notches of various depths in circuit boards correspond with slots of various depths in a card guide so that the boards are not interchangeable.
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patent: 3177461 (1965-04-01), Hagan et al.
patent: 3246279 (1966-04-01), Storcel
patent: 3818280 (1974-06-01), Smith et al.
patent: 4319305 (1982-03-01), Meldrum
patent: 4377315 (1983-03-01), Grau
Kucia R. R.
Linden Gerald E.
United Technologies Corporation
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