{"id":4791,"date":"2025-07-10T08:00:00","date_gmt":"2025-07-10T13:00:00","guid":{"rendered":"https:\/\/patents.harnessip.com\/?p=4791"},"modified":"2025-07-10T13:48:53","modified_gmt":"2025-07-10T18:48:53","slug":"july-10-2025","status":"publish","type":"post","link":"https:\/\/patents.harnessip.com\/?p=4791","title":{"rendered":"July 10, 2025"},"content":{"rendered":"\n

Most inventors hope to leave an indelible mark, some figuratively but a few, like Edson P. Clark do so literally. Edson received U.S. Patent No. 56,180 on July 10, 1866:<\/p>\n\n\n

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This was actually an improvement to the indelible pencil in U.S. Patent No. 24,195 from May 31, 1859:<\/p>\n\n\n

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Edson’s pencil was a commercial success, and examples survive today.<\/p>\n\n\n

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Most inventors hope to leave an indelible mark, some figuratively but a few, like Edson P. Clark do so literally. Edson received U.S. Patent No. 56,180 on July 10, 1866: This was actually an improvement to the indelible pencil in … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-4791","post","type-post","status-publish","format-standard","hentry","category-patent-of-the-day"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4791"}],"version-history":[{"count":1,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4791\/revisions"}],"predecessor-version":[{"id":4801,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4791\/revisions\/4801"}],"wp:attachment":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}