Many of today’s leading lock manufacturers were founded in the course of the 20th century. Schlage was founded in 1920, and Kwikset, inventors of the tubular pin tumbler lock, started in 1946. Medeco has actually been producing high security locks because the 1950’s. In recent times, the most notable development which happens to be the proliferation of high-tech locks and keyless access systems. Modern locksmiths in Pittsburgh to possess a wide variety of locks and tools on the disposal, far beyond what their predecessors may contain imagined.