HIDDEN RELEASABLE BARCODE OR QR CODE FOR INDICATING MATING OR NON-MATING OF TWO ELEMENTS, AND OPERATION THEREOF
A hidden releasable barcode or QR code for indicating mating or non-mating of two elements, which includes a conceiling feature which indicates the non-mating of said two elements, and an indicating feature which indicates the mating of said two elements. The conceiling feature and the indicating fe...
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Format: | Patent |
Sprache: | eng |
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