Key patent expiration dates
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Key Patent Expiration Dates
The following is a reference for the expiration dates of keys and key profiles patents. These are typically associated with high security locks and exist to prevent unauthorized manufacturing of key blanks.
Medeco 2011 Product Catalog: http://medeco.com/images/stories/about/product/6-1-2011-DS_US_Rev_C_NP.PDF
- ↑ "ASSA Catalogue Keys and Keying" (pdf). ASSA. Retrieved 20 January 2023.
- ↑ "Cylinder for Security Doors with Reversible Key R6 SPI". ISEO. 30 June 2022. Retrieved 27 January 2023.
- ↑ Datagram (2012). Mul-T-Lock: Design and Security (pdf).
- ↑ "Best High Security Door Locks: 2022 Buyers Guide". Art of Lock Picking.
- ↑ ASSA-Abloy
- ↑ 6.0 6.1 6.2 6.3 Schlage Key Systems Answer Book
- ↑ Primus Service Manual
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