Inventor
WARD PHILIP IAN
GB4 patents
Patents
4 patentsUS6435538B2Aug 20, 2002
Stair chair
FERNO WASHINGTON59 citations93
US6219864B1Apr 24, 2001
Monitoring patient handling equipment
FERNO WASHINGTON36 citations90
US6644675B2Nov 11, 2003
Stair chair
FERNO WASHINGTON31 citations89
USD430078SAug 29, 2000
Fabric chair with three stair climbing wheels
FERNO WASHINGTON13 citations71