Abstract: Apparatus and methodology for lawn mower security systems provide the ability to safeguard ride-on style lawn mowers against unauthorized cranking of its engine if the mowers have push/pull mower deck or power-takeoff (PTO) switch technology. Security components secured to a PTO or mower deck switch to prevent the ability to position such switch in a disengaged position. Therefore, existing safety and interlock features of the existing ride-on mower otherwise prevent someone from being able to crank the mower, which helps to guard against unauthorized use and/or theft of the equipment.

Abstract: Disclosed are apparatus and corresponding and/or associated methodology for door barricade systems which may be activated from inside an enclosure (or room) while still maintaining controlled serviceability or access to the enclosure from outside of the enclosure. Per some embodiments, bolts passed through a doorframe as a retrofit feature may support an interior plate which has a channel or passage for receipt of a manually removable door block member. The bolts are secured by an exterior plate and custom nuts which have customized drive surfaces. Corresponding custom drive head features interface with the custom nuts for either installation or removal of the door barricade system, even if the door block member is in place. Corresponding hole features on the custom nuts match with custom drive head pin features to provide an effective keyed entrance, which is hardened against forced entry if a person outside the secured room does not have the appropriate custom drive head.