Tree-ring chronology pens, pencils, key chains, and other commonly used articles
Patent 7467904 Issued on December 23, 2008. Estimated Expiration Date: 
December 4, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 4, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for determining the age or authenticity of timber structures Ball pen combined with electronic watch An accessory for attachment of promotional characters to pens, key holders and the like D387088 D391292 D530747 Method for quality assurance of long timber Patent #: 7418874 InventorApplicationNo. 11607609 filed on 12/04/2006US Classes:401/52CombinedExaminersPrimary: Walczak, David JForeign Patent References
International ClassB43K 25/00AbstractA pen comprising wood originating from cutting a tree transversely so it displays a tree's cross section. As a result of the transverse cutting, the product displays a tree's annual growth rings along one axis of the object. Tree-ring analysis is carried out in order to accurately date and subsequently mark the date on one or more of the annual growth rings on the pen. In addition to its operation as a writing instrument, the pen is operated as memorabilia that serves as a “natural” annual chart for important dates of an individual, company, organization, or other entity; a physical object to communicate the natural history of a tree's existence and/or the natural history of its surrounding environment; an educational tool to assist in teaching concepts of dendrochronology and related disciplines (dendroclimatology, dendroarchaeology, dendroecology). | |
