Registers – Transfer mechanism – Traveling pawl
Patent
1975-04-08
1977-07-12
Malzahn, David H.
Registers
Transfer mechanism
Traveling pawl
58152R, G04B 4700, G06F 1520
Patent
active
040356272
ABSTRACT:
A battery powered hand-held calculator for performing arithmetic, triganometric and logarithmic functions and displaying the results thereof is provided with a clock mode which performs the function of a clock and displays real time or the function of a stopwatch and stores and displays the times at which recorded events have taken place.
REFERENCES:
patent: 3788058 (1974-01-01), Idei et al.
patent: 3803834 (1974-04-01), Reese
patent: 3813533 (1974-05-01), Cone et al.
patent: 3816730 (1974-06-01), Yamamoto et al.
patent: 3818457 (1974-06-01), Schleifer
Baum Allen J.
Dickinson Peter D.
Osborne Thomas E.
Rode France
Hewlett--Packard Company
LaRiviere F. D.
Malzahn David H.
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