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Medeco® High Security Locks was born as "Mechanical Development Company," a small tool & die shop in Salem, Virginia. In 1968, the owners and employees of the company developed a unique locking principle of angled key cuts and elevating and rotating pin tumblers that provided millions of key combinations and a level of security that was unmatched in its time. The angled cuts on the key were used to rotate unique bottom pins. Hardened steel inserts and a sidebar were used to produce a cylinder that was highly resistant to virtually all forms of attack. Soon after, Medeco was officially formed and immediately set the standard for high security and key control.
The angled cuts on the Medeco key and the design of the cylinder were so unique that a utility patent was issued. This utility patent protected the operation of the cylinder and also covered the key so that no other manufacturer could produce the cylinder or the key blank. The principle of exclusive manufacturing rights over key blanks was successfully proven in court many times over the life of the original patent, validating the concept of utility patents as an effective method of key control.
Now comes Medeco3 – combining the best of Medeco with engineering innovations that take security to the next level.
The most obvious improvement in Medeco3 is the addition of a 3rd locking element within the cylinder and on the key. With three distinct locking points, Medeco3 continues to resist picking while increasing to 13 billion— the number of unique codes available for master key systems. And of course, you get a strong lock that resists physical attack, with strategically placed hardened-steel inserts to resist drilling.
But it wouldn’t be a Medeco lock if it didn’t offer the highest possible level of protection against unauthorized key duplication. It’s virtually impossible for someone to get a copy of your keys without your permission. Only Medeco security professionals are authorized to copy your key, and only with your consent. Our new patent is your assurance that no one knows how to protect the integrity of your keys better than Medeco.
Good. Better. 3.

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