Tag Archives: patent claim

Nov. 12th in Gennett History, 1904: Eldridge Johnson Filed a ‘divisional (patent) application’…

Nov. 12th in Gennett History, 1904: Eldridge Johnson filed a ‘divisional (patent) application’ that included ‘a tablet having a sound groove of even depth elliptical in cross-section, widest at the mouth of the groove and gradually diminishing toward the bottom … Continue reading

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