In 1919 there was a US patent filed for the bamboo vaulting pole. How an organic product got a patent is unusual.
I loved jumping on Bamboo and you use to get them inside the roll of new carpet. I had one that bent just like a fiberglass pole. ON day I really penetrated on the pole, it really was bending and as I continued to use it. I eventually overstressed it and it broke on a jump, the top of the pole stabbed me in the upper lip and today I have to grow a mustache to cover the scar. GRIN