How Locksmiths Service Patented Lock Systems
Patented locks restrict who can cut keys — but what happens when you need service on a lock your locksmith can't source parts for?
· 6 min read · Security
Patented lock systems are designed with a specific security feature: no one can duplicate keys without proper authorization. This is achieved through a combination of a proprietary keyway and active patent protection that prevents key blanks from being distributed to just anyone.
For commercial properties, this is a significant benefit — you know that a departing employee can't get copies made at the hardware store. But it also creates a dependency on specific service channels that's worth understanding before you invest.
How Patent Protection Works in Practice
When a lock manufacturer patents a keyway (the shape of the key's cross-section and the profile of the corresponding lock cylinder), they can legally prevent other manufacturers from producing compatible key blanks. This means keys for patented systems can only be duplicated by: - Authorized dealers appointed by the manufacturer - The manufacturer's direct service channels - In some cases, the original installing locksmith company that holds a distributor agreement
Active patent protection typically lasts 20 years from the filing date. After a patent expires, the keyway enters the public domain and key blanks become widely available — at which point, the key control benefit is largely lost.
Servicing Patented Lock Systems
If you have a patented lock system installed and need service, your options depend on what type of service is needed.
Rekeying — A locksmith with the appropriate key blanks and the correct rekeying tools can rekey a patented lock, changing which keys will operate it. This requires the locksmith to have a distributor relationship with that manufacturer.
Key Cutting — New keys can only be cut by authorized distributors. If your locksmith doesn't carry that manufacturer's blanks, they'll need to order them, which adds lead time.
Lock Replacement — If the cylinder fails or is damaged, the replacement cylinder must typically be the same brand and product line to maintain the key control system's integrity.
What Happens When a Manufacturer Discontinues a Line?
This is a real risk. If a lock manufacturer discontinues a product line or the company folds, parts and key blanks may become unavailable. In this case, the only option is often to replace the entire system — a significant expense if the system covers many doors.
Choosing Patented Systems Wisely
If you're considering a patented lock system, choose a manufacturer with a strong market presence and long track record. ASSA ABLOY's registered keyway programs, Medeco, and Mul-T-Lock have been established for decades and are unlikely to discontinue their core product lines.
Also ensure your installing locksmith can provide ongoing key cutting and service, not just initial installation. The best patented system provides no benefit if you can't get keys cut when you need them.
Caraballo Locksmith is an authorized dealer for several patented keyway systems. We can advise on which systems are most supported in the Miami market and ensure you have long-term service access.
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