Little Trees are the iconic air fresheners in the shape of a stylized evergreen tree, marketed for use in cars. They are made of a specially formulated absorbent material produced in a variety of colors and scents. They are most commonly seen hanging from rear-view mirrors of vehicles.
These air fresheners were invented in 1952 in Watertown, New York by a German-Jewish immigrant and businessman Julius Sämann. They are manufactured in the US by the CAR-FRESHNER Corporation. A handful of companies in Europe produce Little Trees under license from Julius Sämann Ltd. using the names Wunder-Baum (Sweden, Germany, Poland, Netherlands, Norway, Finland, Denmark, Romania) and Arbre Magique (France, Italy, Spain, Portugal). The company is infamous for many sue cases.
CAR-FRESHNER fiercely defends its trademark on the tree-shaped air freshener design, and in recent years has filed several lawsuits against makers of lookalike products, and against companies that use their products in other commercial media.
In 2002, CAR-FRESHNER sued Rite Way Wholesale and Distributors, Inc. of New York for importing and distributing a "vanilla-scented tree shaped air fresheners with a patriotic design". As a result of the judgement, the defendants were required to surrender their entire inventory to the plaintiffs for destruction, and were required to pay an unspecified penalty.
In 2006, they sued Dale Detwiler (owner of the Austin-based Corndog Cards & Novelties) after Detwiler company produced holiday greeting cards that bore a glow-in-the-dark image of a scratch-and-sniff tree-shaped air freshener.
Julius Sämann Ltd filed a complaint with the Norwegian Industrial Property Office (NIPO) against Bulgarian  air-freshener manufacturer Balev Eood for producing an aircraft-shaped air freshener which was somewhat similar in shape to their trademarked fir tree shape. NIPO rejected the complaint, and the Board of Appeal upheld the decision in January 2011.
In 2011, Car-Freshner sued Beck & Call for producing a similar line of tree-shaped promotional air fresheners.
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