1
Sy Hyman: Article for the dispensing of volatiles. Stephen E Feldman, Marvin Feldman, July 17, 1979: US04161283 (72 worldwide citation)

An article for the slow release of volatilizable substances, such as deodorizers, insecticides, repellants and the like, the article being formed from opposed outer and inner wall members joined along their peripheral portions to define a central reservoir portion for receiving and confining a volat ...


2
Sy Hyman: Article for the dispensing of volatiles. Marvin Feldman, Stephen E Feldman, August 25, 1981: US04285468 (47 worldwide citation)

An article for the slow release of volatilizable substances, such as deodorizers, insecticides, repellants and the like, the article being formed from opposed outer and inner wall members joined along their peripheral portions to define a central reservoir portion for receiving and confining a volat ...