capsoda
Well-Known Member
Hey Matt, Cliff's bottle is the oldest. The 1873 date is the patent date for hydrate of magnesium 8% sollution with water, invented by Charles Henry Phillips.
The phrase milk of magnesia was patented by someone else and phillips didn't start usind it until 1880. That would be your bottle with the 1873 patent date peened out.
The familar and common 1906 bottle has the patent date for the trade mark shield. The link below it the patent date for the trade mark. http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=71016576
The phrase milk of magnesia was patented by someone else and phillips didn't start usind it until 1880. That would be your bottle with the 1873 patent date peened out.
The familar and common 1906 bottle has the patent date for the trade mark shield. The link below it the patent date for the trade mark. http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=71016576