Hallwood & American Cash Register Co.
The Hallwood Cash Register co was formed in 1892 and became The American Cash Register Co in 1911 and was still in business till 1922. No real Serial number records were kept.

Bensinger Cash Register Co. was incorporated in Jan. 1889 and bought by NCR in late 1890. No serial # list.

Boston Cash Register & Recording Co.
Formed on Sept. 3, 1886 and became the Boston Cash Register Co on April 5, 1891. They went out of business in October 1896 after building about 3000 machines.

Century Cash Register Co.
The following registers were interconnected

All of these registers were sold between 1890 till 1904(?). No records for dates

Chicago Cash Register Co. - Formed in 1890(?) and became the Navy Cash Register co. 1899(?)  NCR acquired them in 1905.

Ideal Cash Register Co. - Formed in Sept. 30, 1897 to Oct.12, 1903.

Imperial Cash Register was manufactured by the Osborn Cash Register Co. 1891 till 1900, acquired by NCR.

Kruse Dial Register - 1885 to 1889. Forced out of business by NCR.

Lamson Cash Register Co - Started in New Jersey in 1888? And was bought out by NCR in 1893.

Michigan Cash Register Co.
This Company was formed in 1907 and registers were built until 1922. This register closely resembles many register and was marketed under any name that you were willing to pay for. A lot were free if you bought merchandise from the vendor.

Peninsular Cash Register Co - 1896 to 1904. These were also free in some cases. For example, Murren was a cigar manufacturing company and if you bought enough cigars, they provided you with a cash register.

Just about like the Michigan but pre-dates it.

Remington Cash Register