US2838361A
(en )
1958-06-10
Time recording apparatus
DE252205C
(enrdf_load_stackoverflow )
GB373992A
(enrdf_load_stackoverflow )
GB1243307A
(en )
1971-08-18
Improvements in or related to attendande recorders
US3409903A
(en )
1968-11-05
Elapsed time recorder with printing disk and concentrically mounted strikers
US2736023A
(en )
1956-02-21
La vergne h
US2553644A
(en )
1951-05-22
Time recorder
US3019074A
(en )
1962-01-30
Time recording device and card therefor
US908971A
(en )
1909-01-05
Time-registering clock.
US1300909A
(en )
1919-04-15
Time-stamp.
US700688A
(en )
1902-05-20
Time-stamp.
US2712900A
(en )
1955-07-12
Handley
US500037A
(en )
1893-06-20
Workman s time-recorder
US2598331A
(en )
1952-05-27
Time computing and recording
GB742142A
(en )
1955-12-21
Improvements in or relating to record card controlled statistical machines
GB595606A
(enrdf_load_stackoverflow )
US927805A
(en )
1909-07-13
Workman's time-recorder.
US688391A
(en )
1901-12-10
Time-stamp.
US1007672A
(en )
1911-11-07
Time-stamp.
GB718565A
(en )
1954-11-17
Improvements in or relating to machines controlled by statistical record cards
US1358284A
(en )
1920-11-09
carroll
US1505582A
(en )
1924-08-19
Schaft
GB190814309A
(en )
1909-07-05
Improvements in Workman's Time Recorders.
US917761A
(en )
1909-04-13
Workman's time-recorder.
GB108313A
(en )
1918-06-27
An Improved Machine for Checking or Verifying the Correctness of the Positions of Holes Punched in Record Cards and the like.