| http://www.w3.org/ns/prov#value | - Assistant Examiner-Bruce H. Hess Attorney, Agent, or FirmWilliam R. Liberman ABSTRACT 13 Claims, N0 Drawings DRY WIPE WRITING SYSTEM AND INK THEREFOR This invention relates to a new dry-wipe writing system of particular application in education and in other fields where it is desired to write indicia, such as letters and figures, on a display sheet and to be able to rub off the indicia simply by d
|
