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Beginning in 1993 federal safety standards required that all garage door openers include an anti entrapment feature like the infrared garage door sensors found on most modern models.
As a result of the change in safety standards many manufacturers have been deleting pre 1993 manuals from what.
Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
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