ELLIS ADDING TYPEWRITER COMPAN innovation strategy

Patent filings in countries

#	Industry
#1	Computer technology
#2	Textiles and paper

#	Technology
#1	Mechanically computing digital computers
#2	Typewriters

Publication	Filing date	Title
GB407738A	1932-09-29	Improvements in or relating to calculating machines, accounting machines and similar machines
GB361863A	1930-08-25	Improvements in or relating to paper feeding means for calculating machines, bookkeeping machines and similar machines
DE607524C	1930-01-09	Adding machine
US1819067A	1929-10-04	Overdraft and signal printing mechanism for calculating machines
US1819068A	1929-09-16	Overdraft and signal printing mechanism for calculating machines
US1875913A	1929-09-16	Carriage control of ribbon shift mechanism
US1670018A	1926-10-16	Automatic carriage-return mechanism
US1884189A	1926-09-16	Combined calculating and card printing and perforating machine
US1599634A	1925-01-12	Signal-printing mechanism
US1559149A	1925-01-12	Duplex paper table
DE444541C	1924-08-09	Adding machine
US1508267A	1924-06-04	Overdraft key-locking and indicating mechanism for calculating machines
US1562491A	1921-09-24	Automatic nonprinting mechanism
CA310401A	None	Calculating machine
CA310400A	None	Calculating machine
CA310399A	None	Subtracting control for calculating machines
CA310398A	None	Calculating machine
CA304016A	None	Card printing and perforating machine
CA326172A	None	Multiple accumulator calculating machine
CA320172A	None	Operating device for front feed platens