Abstract: A two-piece placard holder having a mounting element for hanging from a post of a rearview mirror and a display frame for holding the placard. The display frame and mounting element are magnetically attached to one another to allow for easy assembly of the display frame to the mounting element (for hanging the placard, such as while parked) and easy dismounting of the display frame (and placard disposed therein) from the mounting element (for stowing the placard, such as while driving).

Abstract: A placard holder device that removably holds for display an informational placard that can be viewed through the windshield of a parked vehicle, and which enables simple and quick manual repositioning into a stored position that does not obstruct the line of sight through the windshield. Only a single action step is needed to make the placard visible or invisible. The device features: a frame that removably holds the placard for display, a mounting body having a hinged connection to the frame, a clasp distal to the hinged connection for releasably clasping the frame to the body, and a clip for removable attachment to a visor of the vehicle. Examples of informational placards include: handicapped or parking passes; identifications of a parked vehicle of a member of the media/press, or of a delivery service; placards that display information about a vehicle at a car show or dealership.

Abstract: A placard holder device that removeably holds for display an informational placard that can be viewed through the windshield of a parked vehicle, and which enables simple and quick manual repositioning into a stored position that does not obstruct the line of sight through the windshield. Only a single action step is needed to make the placard visible or invisible. The device features: a frame that removeably holds the placard for display, a mounting body having a hinged connection to the frame, a clasp distal to the hinged connection for releasably clasping the frame to the body, and a clip for removable attachment to a visor of the vehicle. Examples of informational placards include: handicapped or parking passes; identifications of a parked vehicle of a member of the media/press, or of a delivery service; placards that display information about a vehicle at a car show or dealership.

Abstract: A supply of gas such as oxygen is provided to a person in need of such gas supply. The delivery system includes an alarm to alert the recipient of the gas or another when and if the gas supply is disrupted. The alarm system preferably includes a reset and on-off switch that is recessed sufficiently to prevent accidental disabling of the alarm system.