Baker & McKenzie
All purpose saw blade
 To provide a general-purpose saw blade which will saw different materials cost effectively, the saw blade includes a plurality of sets of teeth, each set including saw tooth having a large relief angle and a small tooth angle which provide fast cutting speeds, and with saw tooth having a small relief angle and a large tooth angle which provide the resistance to chipping. 
Armstrong-Blum Mfg. Co
B Y B Y Y
B23D Y10T B23D Y10T Y10T
inventional additional inventional additional additional
Kunihiko Donald L. Akiyoshi
Okada Armstrong Yoneda