Propelling device patent sweatshirt - Sigma Shirts
Propelling device patent sweatshirt - Sigma Shirts
Propelling device patent sweatshirt - Sigma Shirts

Propelling device patent sweatshirt

Regular price
$30.00 USD
Sale price
$30.00 USD
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This soft and comfy t-shirt is made fome 100% combed and ring-spun cotton (heather colors contain polyester).

Did you know?

This device was invented by the americans H. T. Brant and H. M. Turner in 1919.

This invention consisted of attaching a spring under the shoes to, according to them, facilitate running, jumping and vaulting.It was patented (US1331952A) in 1920 but never really caught on. Interestingly, several similar patents were granted for similar devices over the years. Would you try these propelling device?