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This unique t-shirt features Air Duct schematics from a genuine vintage U.S. Patent filed in 1940! These shirts look awesome, fit well, are great conversation starters and an excellent gift for...

This unique t-shirt features Bowling Pin Setter schematics from a genuine vintage U.S. Patent filed in 1942! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Fire Alarm System schematics from a genuine vintage U.S. Patent filed in 1883! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Defibrillator schematics from a genuine vintage U.S. Patent filed in 2003! These shirts look awesome, fit well, are great conversation starters and an excellent gift...

This unique t-shirt features F40 Sports Car schematics from a genuine vintage U.S. Patent filed in 1990! These shirts look awesome, fit well, are great conversation starters and an excellent gift...

This unique t-shirt features Corkscrew schematics from a genuine vintage U.S. Patent filed in 1862! These shirts look awesome, fit well, are great conversation starters and an excellent gift for...

This unique t-shirt features Underwater Wellhead schematics from a genuine vintage U.S. Patent filed in 1965! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Padlock schematics from a genuine vintage U.S. Patent filed in 1877! These shirts look awesome, fit well, are great conversation starters and an excellent gift for...

This unique t-shirt features Pool Skimmer schematics from a genuine vintage U.S. Patent filed in 1974! These shirts look awesome, fit well, are great conversation starters and an excellent gift...

This unique t-shirt features Battery Electrode schematics from a genuine vintage U.S. Patent filed in 1927! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Street Traffic Interchange schematics from a genuine vintage U.S. Patent filed in 1925! These shirts look awesome, fit well, are great conversation starters and an...

This unique t-shirt features Howdy Doody Puppet schematics from a genuine vintage U.S. Patent filed in 1950! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Nikola Tesla Arc Lamp schematics from a genuine vintage U.S. Patent filed in 1886! These shirts look awesome, fit well, are great conversation starters and an...

This unique t-shirt features Lemat Revolver schematics from a genuine vintage U.S. Patent filed in 1856! These shirts look awesome, fit well, are great conversation starters and an excellent gift...

This unique t-shirt features Drink Mixing schematics from a genuine vintage U.S. Patent filed in 1956! These shirts look awesome, fit well, are great conversation starters and an excellent gift...

This unique t-shirt features Dustpan schematics from a genuine vintage U.S. Patent filed in 1899! These shirts look awesome, fit well, are great conversation starters and an excellent gift for...

This unique t-shirt features Shower Faucet Valves schematics from a genuine vintage U.S. Patent filed in 1925! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Dump Truck schematics from a genuine vintage U.S. Patent filed in 1949! These shirts look awesome, fit well, are great conversation starters and an excellent gift for...

This unique t-shirt features Potato Picking Belt schematics from a genuine vintage U.S. Patent filed in 1928! These shirts look awesome, fit well, are great conversation starters and an excellent...

This unique t-shirt features Model 1903 Pistol schematics from a genuine vintage U.S. Patent filed in 1903! These shirts look awesome, fit well, are great conversation starters and an excellent...