Title: |
1868 Ad-E. H. Bellows, Balanced Slide Valve |
Source: |
Worcester City Directory, 1868, pg. 9 |
Insert Date: |
6/19/2022 9:47:37 PM |
12 Nov., 1856 is not a valid patent date.
The Balance Slide Valve was actually patented on 12 Nov., 1867, patent #70,784.
https://datamp.org/patents/displayPatent.php?number=70784&typeCode=0 |
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1868 E. H. Bellows, Balanced Slide Valve
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