GB1317386A
|
|
Optical scanning systems
|
US3761079A
|
|
Document feeding mechanism
|
US3715568A
|
|
System for gathering and transmitting source data
|
US3643348A
|
|
System and method for individually programmed automatic test grading and scoring
|
US3628031A
|
|
Closed loop control system for automatic sensitivity control of transducer
|
US3445942A
|
|
Multiple printout test grading machine
|
US3550290A
|
|
Output recording system
|
GB1210265A
|
|
Test grading and marking method and apparatus
|
US3487561A
|
|
Test grading and marking method and apparatus
|
US3284929A
|
|
Test grading machine
|
CA882229A
|
|
Test grading and marking method and apparatus
|
CA909373A
|
|
Automatic sensitivity control system
|
CA882228A
|
|
Test grading and marking method and apparatus
|
CA899053A
|
|
Multiple printout test grading machine
|
CA913748A
|
|
Automatic sensitivity control system
|
CA873556A
|
|
Output recording system
|