Key patent expiration dates
From Lockwiki
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.
| Manufacturer | Model | Expiration | Patent Numbers |
| ASSA | Twin V-10 | 2014 | 5,067,335 & 5,640,865 |
| Medeco | Original | 1985 | |
| Medeco | Biaxial | 2005 | |
| Medeco | KeyMark | 2011 | |
| Medeco | M3 | 2021 | 6,477,875 |
| Medeco | KeyMark X4 | 2027 | |
| Schlage | Primus | 2007[1] | 4,756,177 & 4,815,307 |
| Schlage | Everest | 2014[1] | 5,715,717 |
| Schlage | Primus Everest | 2014[1] | 5,715,717 & 5,809,816 |
| Schlage | Everest SFIC | 2014[2] | 5,715,717 |
| Schlage | Primus XP | 2024[1] | 7,159,424 |
References
Medeco 2011 Product Catalog: http://medeco.com/images/stories/about/product/6-1-2011-DS_US_Rev_C_NP.PDF
See also
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