US Patent 10493177 Solid state fragrancing

Fragrance control is provided by articles of manufacture including various solid state fragrancing objects, methods of using such objects, and systems that employ one or more such objects. The fragrancing object can be easy to manufacture, long lasting, provide fragrance that is consistently released over time, provide an indication to the user that the object needs to be replaced, and can hold a desired ratio of fragrance. The solid state fragrancing object can be coupled to an air vent to inconspicuously provide fragrance to a user in an environment, such as the interior of a vehicle.