01292oam 2200361Ia 450 991069169790332120040417132739.0(CKB)5470000002346400(OCoLC)49047381ocm49047381(OCoLC)995470000002346400(EXLCZ)99547000000234640020020220g19979999 ua 0engtxtrdacontentcrdamediacrrdacarrierClassification main menu[electronic resource]Washington, D.C. U.S. Patent and Trademark Office1997-Title from header title last updated Mar. 6, 2004 (viewed on Apr. 17, 2004).Access patent classification info by class/subclass -- Search US Manual of Classification.Provides access to the US manual of classification and patent classification information. Contains FirstGov search engine.Patent classification home pagePatentsUnited StatesClassificationDatabasesPatentsUnited States.Patent and Trademark Office.ECBECBGPOBOOK9910691697903321Classification main menu3099744UNINA