US RE 8560,Passmore, Everett G.,「Improvement in Lawn-Mowers」,发表于23 February 1869,发行于28 January 1879; see pg 1, col 2. For a copy, see Google Patents copy (页面存档备份,存于互联网档案馆). This source indicates the patent number as "6,080". According to "British patent numbers 1617 – 1852 (old series) (页面存档备份,存于互联网档案馆)", the patent number would have been assigned sometime after 1852 and taken the form of "6080/1830".
google.com
US RE 8560,Passmore, Everett G.,「Improvement in Lawn-Mowers」,发表于23 February 1869,发行于28 January 1879; see pg 1, col 2. For a copy, see Google Patents copy (页面存档备份,存于互联网档案馆). This source indicates the patent number as "6,080". According to "British patent numbers 1617 – 1852 (old series) (页面存档备份,存于互联网档案馆)", the patent number would have been assigned sometime after 1852 and taken the form of "6080/1830".
ipo.gov.uk
US RE 8560,Passmore, Everett G.,「Improvement in Lawn-Mowers」,发表于23 February 1869,发行于28 January 1879; see pg 1, col 2. For a copy, see Google Patents copy (页面存档备份,存于互联网档案馆). This source indicates the patent number as "6,080". According to "British patent numbers 1617 – 1852 (old series) (页面存档备份,存于互联网档案馆)", the patent number would have been assigned sometime after 1852 and taken the form of "6080/1830".
Mower History. oldlawnmowerclub.co.uk. [2017-08-05]. (原始内容存档于2020-09-28).
US RE 8560,Passmore, Everett G.,「Improvement in Lawn-Mowers」,发表于23 February 1869,发行于28 January 1879; see pg 1, col 2. For a copy, see Google Patents copy (页面存档备份,存于互联网档案馆). This source indicates the patent number as "6,080". According to "British patent numbers 1617 – 1852 (old series) (页面存档备份,存于互联网档案馆)", the patent number would have been assigned sometime after 1852 and taken the form of "6080/1830".