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2. Video door-phone - Wikipedia

   en.wikipedia.org/wiki/Video_door-phone

   A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building ( residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is ...

3. Wireless intercom - Wikipedia

   en.wikipedia.org/wiki/Wireless_intercom

   A wireless intercom is a telecommunications device that enables voice communication without the need to run copper wires between intercom stations. A wired intercom system may incorporate wireless elements. There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the ...

4. Intercom - Wikipedia

   en.wikipedia.org/wiki/Intercom

   An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1] Intercoms are generally mounted permanently in ...

5. Court approves 3M settlement over 'forever chemicals' in ...

   www.aol.com/lifestyle/court-approves-3m...

   St. Paul, Minnesota-based 3M announced Monday that last year’s lawsuit settlement received final approval from the U.S. District Court in Charleston, South Carolina. The agreement called for ...

6. 3M Architectural Markets Opens Showroom in International ...

   www.aol.com/2013/02/20/3m-architectural-markets...

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7. Intercom, Inc. - Wikipedia

   en.wikipedia.org/wiki/Intercom,_Inc.

   US$200 million (2021) [1] Number of employees. 1,013 (2022) [2] Website. intercom .com. Intercom, Inc. is a software company that specializes in business messaging, providing businesses with a way to chat with their customers. [3] Intercom has its headquarters in San Francisco with offices in Chicago, Dublin, Sydney and London .