Denver. Business. Security Protection devices booming in Denver. 1970 Residential Security Incorporated, private security- guard company, may not be providing services. Under investigation. Post D 11, 1976 p.1 RMN D 12, 1976 p.10 Denver firm, Homewatch Corporation., care for homes of vacationing residents. Post Roundup Mr 13, 1977 p.45 Interview with director of new Rocky Mountain division of nation's sixth largest security agency, Guardsmark Inc. RMN F 23, 1981 p.55
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