I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
TMC HR157-BK CNC Aluminum Flat Surface Mount for Camera Tripod BlackDescription: TMC HR157-BK CNC Aluminum Flat Surface Mount for Camera Tripod Black Features: - Brand: TMC Sport Gear - Material: CNC Aluminum processing - Fit Gopro HD Hero2/ 3/3+ J-hook buckle and stardand Cam Tripod - Color: Black Shipping & Payment:
Selling my portable Gold Line RTA with calibrated mic and balanced cable to hook mic to RTA. This has been great for setting up my car stereo as well as my home theater installation. This is a quality calibrated omnidirectional mic that cost 500.00 new, the DSP-30 is also quite expensive new.
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