Marie Van Brittan Brown and her husband, Albert, filed for the patent in 1966 and received approval three years later.
The Dual Camera Edition steps things up with a 3MP main camera offering a 160° FOV, paired with an additional 2MP camera with a 128° FOV.
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How to Make Door Alarm

Dive into the world of creative DIY woodworking with our latest project: making a cow bullock cart from bamboo! This video guides you through each step of the process, showcasing the craftsmanship and ...