How long have Brockwood Worm Harvesters been around?

I built the first Stall Shi*fter in November of 1996 and introduced it to the public at the Hoosier Horse Fair in Indianapolis in April of 1997. We have been improving and fine-tuning it ever since. The Worm harvester is exactly the same basic machine with the screen being the only difference. It is proven technology and field tested for 20+ years.