BNSF receives patent for moving block system(trn.trains.com)
trn.trains.com
BNSF receives patent for moving block system
https://trn.trains.com/news/news-wire/2021/02/09-bnsf-receives-patent-for-moving-block-system
https://trn.trains.com/news/news-wire/2021/02/09-bnsf-receives-patent-for-moving-block-system
source: https://uspto.report/patent/grant/10894550