Inventor
PETTIGREW ROBERT M
GB25 patents
⚠️ This page may combine multiple inventors who share the name “PETTIGREW ROBERT M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEIDENHAIN GMBH DR JOHANNES
4 patentsUS4776701AOct 11, 1988
Displacement measuring apparatus and method
HEIDENHAIN GMBH DR JOHANNES89 citations96
US4636076AJan 13, 1987
Displacement measuring apparatus and method
HEIDENHAIN GMBH DR JOHANNES35 citations92
US4657780AApr 14, 1987
Manufacture of diffraction gratings
HEIDENHAIN GMBH DR JOHANNES17 citations73
US4733968AMar 29, 1988
Datum sensing using optical grating
HEIDENHAIN GMBH DR JOHANNES3 citations60