Multi-function tape recorder having automatic timing and signall

Details Multi-function tape recorder having automatic timing and signall Multi-function tape recorder having automatic timing and signall

1977-07-06

1979-10-30

Hum, Vance Y.

35 8A, G09B 1906

Patent

active

041723295

ABSTRACT:
A tape recorder for instructional purposes comprises a timing and signalling circuit which responds to the giving of instruction by illuminating an LED on termination of the instruction for a period equal to the duration of the interval between commencement of the instruction and illumination of the LED.

REFERENCES:
patent: 3405238 (1968-10-01), Hurvitz
patent: 3495337 (1970-02-01), Meyer et al.
patent: 3550289 (1970-12-01), Orita et al.
patent: 3571524 (1971-03-01), Kozu et al.
patent: 3641507 (1972-02-01), Kosaka et al.
patent: 3683515 (1972-08-01), Kosaka
patent: 3702506 (1972-11-01), Goshima et al.

Affiliated with

Also associated with

Rating

Multi-function tape recorder having automatic timing and signall does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-function tape recorder having automatic timing and signall, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-function tape recorder having automatic timing and signall will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-14372