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We first started using yellow trucks over 50 years ago. Today they have become a recognizable symbol of our company. About Us Why Choose Koorsen? Since 1946, people have trusted Koorsen to protect their businesses and homes. From our knowledgeable sales people to our highly trained technicians, we have been committed to providing complete fire protection and security solutions that don’t just protect buildings—but protect lives too. 01 History Family[…]