Assignee
TOUCHSTONE APPLIED SCIENCE ASS
US·3 granted patents·84 citations·filing 1989–1992
Top patents by PatentIndex Score
3 records- 0167US5102341ATest answer and score sheet deviceTOUCHSTONE APPLIED SCIENCE ASS·Filed 1990·Granted Apr 7, 1992·50 cites·13 claims
- 0251US5293273AVoice actuated recording device having recovery of initial speech data after pause intervalsTOUCHSTONE APPLIED SCIENCE ASS·Filed 1992·Granted Mar 8, 1994·16 cites·15 claims
- 0344US4943239ATest answer and score sheet deviceTOUCHSTONE APPLIED SCIENCE ASS·Filed 1989·Granted Jul 24, 1990·18 cites·23 claims
Join the waitlist — get patent alerts
Get an alert when TOUCHSTONE APPLIED SCIENCE ASS files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →