Inventor · disambiguated record
Donald R. Armstrong
Also filed as: ARMSTRONG DONALD R
4 granted patents·25 citations·filing 1983–2000
74Inventor score
Technology areasF16P
Top patents by PatentIndex Score
4 records- 0151USD434158SLadder step extenderARMSTRONG DONALD R·Filed 2000·Granted Nov 21, 2000·10 cites·1 claims
- 0245USD409765SLadder step extenderARMSTRONG DONALD R·Filed 1998·Granted May 11, 1999·7 cites·1 claims
- 0342USD390669SLadder step extenderARMSTRONG DONALD R·Filed 1997·Granted Feb 10, 1998·6 cites·1 claims
- 0425US4570777ATreadle controlBAKER & CO HUGH J·Filed 1983·Granted Feb 18, 1986·2 cites·12 claims
Join the waitlist — get patent alerts
Get an alert when Donald R. Armstrong files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →