Inventor

WALKER DONALD A

US4 patents

⚠️ This page may combine multiple inventors who share the name “WALKER DONALD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

IBM

2 patents

US4375339AMar 1, 1983

Electrically conductive ribbon break detector for printers

IBM39 citations91

US4396308AAug 2, 1983

Ribbon guiding for thermal lift-off correction

IBM23 citations80

JAVEY SHAHRAM

1 patent

US8618941B2Dec 31, 2013

Systems and methods of interaction with water usage information

JAVEY SHAHRAM47 citations92

NCR CO

1 patent

US4101905AJul 18, 1978

Method for writing and viewing magnetic human readable characters and viewing means therefor

NCR CO9 citations72