The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1987
Filed:
Feb. 01, 1985
David A Blackshear, Mahtomedi, MN (US);
Perry L Blackshear, Jr, Minneapolis, MN (US);
Other;
Abstract
A humidity modifying device for guitars, and similar musical instruments which are susceptible to damage such as cracking, splitting, etc. when subjected to deleterious humidity conditions. Such instruments characteristically have a sound box formed from wood, strings and a sound hole underlying the strings. The humidity modifying device comprises a resilient plug adapted to be disposed in the sound hole with a sealing fit and having a humidity modifying material, such as a moisture retentive sponge-like pad or desiccant cartridge, secured to the inner surface of the plug to maintain desired humidity conditions within the sound box. Preferably the moisture-retentive means or desiccant is retained within a pocket or chamber within the plug by means of a closure plate supported by a flange formed in the bottom surface of the plug.