There thousands of companies in the world they produce door locking device/ Door Locks/Home Security. Here is the list of top Companies from the World according to Company size, Brand Presence and products Range.
1.Assa Abloy
Assa Abloy AB is a Swedish conglomerate whose offerings include products and services related to locks, doors, gates, and entrance automation. Related products and services include controlling access and confirming identities with keys, cards, tags, mobile, and bio-metric identity verification systems
ASSA-Abloy owns and manufactures locks of brands Medeco, Corbin Russwin, Yale and Mult-T-Lock. Yes, all of those made the list. You have to thank ASSA-Abloy for that. They have their hand in different kinds of security parts but their most popular are the door lock brands.
