Default Proof Credit Card System v. Home Depot

Default Proof patented technology protected over-the-counter, pre-paid debit cards purchased through a point-of-sale machine. The "means-plus-function" claim was found indefinite under section 112 because the specification failed to disclose any structure linked to the function of dispensing credit cards. The CAFC further found that expert testimony could not cure the defect in the specification. Listen to the CAFC's published opinion. [MP3]