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221. Life Safety Engineered Systems

     Cheektowaga, NY

     • Security Integrators

     (716) 656-8890lifesafetysecurity.com (opens in a new tab)

222. Life Safety Integrated Systems Inc

     Orchard Park, NY

     • Security Integrators

     (716) 200-4218lsisinc.com (opens in a new tab)

223. LifeSafety Power Inc.

     • Manufacturers

     (888) 577-2898lifesafetypower.com (opens in a new tab)

224. Lone Star Communications, Inc

     Grand Prairie, TX

     • Security Integrators

     (972) 336-0000lonestarcom.com (opens in a new tab)

225. LONG Building Technologies, Inc. AK

     Littleton, CO

     • Security Integrators

     long.com (opens in a new tab)

226. Low Voltage Wiring, LTD

     Colorado Springs, CO

     • Security Integrators

     (719) 540-8900lvw.com (opens in a new tab)

227. Luminys Systems Corporation

     • Manufacturers

     (949) 679-7777luminyscorp.com (opens in a new tab)

228. LVC Companies

     Edina, MN

     • Security Integrators

     (952) 292-5837lvcinc.com (opens in a new tab)

229. M R Solutions Inc

     Denver, CO

     • Security Integrators

     (303) 296-3328

230. M&R Electronic Systems, Inc.

     Lincolnshire, IL

     • Security Integrators

     (847) 634-1200mandr-inc.com (opens in a new tab)

231. M2M Services

     • Manufacturers

     (800) 403-7029m2mservices.com (opens in a new tab)

232. M3T Corporation

     Mechanicsburg, PA

     • Security Integrators

     m3tcorporation.com (opens in a new tab)

233. Macurco

     • Manufacturers

     (877) 367-7891macurco.com (opens in a new tab)

234. Magnasphere Corporation

     • Manufacturers

     (272) 347-0710magnasphere.com (opens in a new tab)

235. Marathon Technology Solutions, Inc.

     Eldersburg, MD

     • Security Integrators

     (410) 875-7955marathontechinc.net (opens in a new tab)

236. MDC Low Voltage Systems

     San Francisco, CA

     • Security Integrators

     mcmillansecurity.com (opens in a new tab)

237. Metro Access Control

     Portland, OR

     • Security Integrators

     (503) 285-7568metrooverheaddor.com (opens in a new tab)

238. Metropolitan Electrical Construction Inc

     San Francisco, CA

     • Security Integrators

     (415) 642-3000metroelectic.com (opens in a new tab)

239. Mid Ohio Valley Integrated Systems LLC

     Marietta, OH

     • Security Integrators

     (740) 305-5171mov-is.com (opens in a new tab)

240. Mile High Security Solutions

     Colorado Springs, CO

     • Security Integrators

     (719) 593-8300milehighss.net (opens in a new tab)