Safety Gate Closure Preventer (a.k.a Ergonomic Doorstop) has a Market Potential valued at $ 2.475 B USD. Prevents entrapment in walk-in: coolers, ovens, freezers and similar chamber doors from completely shutting closed. Productivity arises from reduced motions to complete the tasks to move a object through a doorways. As documented in time-motion studies and reduced MSK injury claims, the rates and costs of which are established / determined by motion stresses in studies involving similar activities the injury rate is 8.5%. One of three patents bundled together to form the Productive Engineered Safety Aids that deliver highly beneficial operational and safety results with very short ROI. See also: US-20190323658 Fiber Optic Safety System and US-11680681 Methods and apparatus for providing safety default states in mechanical equipment, processes and mechanisms patent