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Valid until 12/09/18. Can’t be combined with other discounts or coupon codes. Not valid in combination with volume discount. Not valid toward purchase of gift certificates. Valid on www.spreadshirt.ca. Not valid in Spreadshirt's Partner Shops.
We love Patent Prints. The old and rare drawings and illustrations that are part of patent blueprints make for fantastic artwork on any product. Our goal is to display and promote vintage patents as a way of preserving history.