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This unique t-shirt features Trampoline schematics from a genuine vintage U.S. Patent filed in 1958! These shirts look awesome, fit well, are great conversation starters and an excellent gift for gymnasts, gym teachers & gymnastics...

This unique t-shirt features Farnsworth Vacuum Tube schematics from a genuine vintage U.S. Patent filed in 1934! These shirts look awesome, fit well, are great conversation starters and an excellent gift for computer technicians, engineers and tech...

This unique t-shirt features Wind Surfing Board schematics from a genuine vintage U.S. Patent filed in 1982! These shirts look awesome, fit well, are great conversation starters and an excellent gift for surfers & beach lovers! Product Type:...

This unique t-shirt features Gold Sifting Pan schematics from a genuine vintage U.S. Patent filed in 1897! These shirts look awesome, fit well, are great conversation starters and an excellent gift for miners, oil & gas workers and petroleum...

This unique t-shirt features Trolley Meat Hook schematics from a genuine vintage U.S. Patent filed in 1931! These shirts look awesome, fit well, are great conversation starters and an excellent gift for chefs, restaurant owners, kitchen workers & food...

This unique t-shirt features Train Locomotive schematics from a genuine vintage U.S. Patent filed in 1937! These shirts look awesome, fit well, are great conversation starters and an excellent gift for conductors, engineers & train...

This unique t-shirt features Oil Well Drill Bit schematics from a genuine vintage U.S. Patent filed in 1943! These shirts look awesome, fit well, are great conversation starters and an excellent gift for miners, oil & gas workers and petroleum...

This unique t-shirt features Lawn Mower schematics from a genuine vintage U.S. Patent filed in 1971! These shirts look awesome, fit well, are great conversation starters and an excellent gift for gardeners, yard lovers & landscaping...

This unique t-shirt features Washing Machine schematics from a genuine vintage U.S. Patent filed in 1966! These shirts look awesome, fit well, are great conversation starters and an excellent gift for homemakers & housekeeping...

This unique t-shirt features Slot Machine schematics from a genuine vintage U.S. Patent filed in 1932! These shirts look awesome, fit well, are great conversation starters and an excellent gift for game lovers & bar owners! Product Type:...

This unique t-shirt features Dynamic Speaker schematics from a genuine vintage U.S. Patent filed in 1965! These shirts look awesome, fit well, are great conversation starters and an excellent gift for dj's, sound engineers, music producers, and audio...

This unique t-shirt features Slingshot schematics from a genuine vintage U.S. Patent filed in 1952! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hunters, fishermen & outdoors enthusiasts! Product...