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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
O'Brien; Dennis P.
Address:
St. Paul, MN
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5039243 Fragrance releasing crayons August 13, 1991
Crayons are provided with microcapsules containing fragrant materials within the shell of the microcapsules. Applying color to surfaces ruptures some of the microcapsules and releasing a fragrance. Some microcapsules remain intact within the color applied to the surface and may be ruptur










 
 
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