1. Spectacles
1.1
1.2
1.3
1.4
1.5
1.6
1.7
The broken lines in figs.
1. Spectacles
1.1
1.2
1.3
1.4
1.5
1.6
1.7
The broken lines in figs.
Number | Name | Date | Kind |
---|---|---|---|
1866734 | Tillyer | Jul 1932 | A |
1876497 | Hancock | Sep 1932 | A |
1899777 | Stanley | Feb 1933 | A |
1906672 | Toulmin, Jr. | May 1933 | A |
D91146 | Stevens | Dec 1933 | S |
1942333 | Haussmann | Jan 1934 | A |
2045399 | McMurdo | Jun 1936 | A |
2276102 | Schwartz | Mar 1942 | A |
2895376 | Linder, Jr. | Jul 1959 | A |
D285309 | Rips | Aug 1986 | S |
D310377 | Wang-Lee | Sep 1990 | S |
5805263 | Reymondet | Sep 1998 | A |
D416923 | Jahnke | Nov 1999 | S |
D427620 | Spivey | Jul 2000 | S |
D556228 | Lam | Nov 2007 | S |
D663335 | Freier | Jul 2012 | S |
D931352 | Kossev | Sep 2021 | S |
11372266 | Perryman | Jun 2022 | B1 |
20130208238 | Blum | Aug 2013 | A1 |
20170212364 | Lin | Jul 2017 | A1 |
20190033619 | Neitz | Jan 2019 | A1 |
20200331219 | Van Heugten | Oct 2020 | A1 |
20210382325 | Kubota | Dec 2021 | A1 |
20220137264 | Inaba | May 2022 | A1 |
Number | Date | Country |
---|---|---|
301076602.0000 | Sep 2020 | KR |
Entry |
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Google Term Search: ‘Bifocal’, [site visited Aug. 26, 2022] <URL: https://www.google.com/search?q=bifocals&sxsrf=ALiCzsaW9Z_Tps6WcUd6l8eWf1jA-oOHZg:1665192923761&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiU4s-Fv8_ 6AhV8KFkFHQQhAulQ_AUoAXoECAEQAw&biw=1920&bih=1057&dpr=1> (Year: 2022). |