WD-40 is not patented, and the company claims it's because the formula is so secret, only a handful of people even know it. Here's how it keeps the secret.
WD-40 Isn't Patented - Here's How The Company Keeps Its Formula A Secret
Slash Gear - 18 Oct 2026 20:15
WD-40 is not patented, and the company claims it's because the formula is so secret, only a handful of people even know it. Here's how it keeps the secret.
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