IFI

Patent Intelligence & Technology Report

Class Distribution for 1990-1999 

418 - ROTARY EXPANSIBLE CHAMBER DEVICES (IPC F04C, F01C)

       1999  1998  1997  1996  1995  1994  1993  1992  1991  1990  Total

SANDEN CORP JP
          6     4     3     2     5     2     1     4     3     4     34
DAIKIN KOGYO CO LTD JP
          0     0     2     3     1     2     2     0     0     0     10
VOLKSWAGENWERK AG DE
          0     0     0     0     0     0     0     1     0     1      2
SUZUKI JIDOSHA KOGYO K K JP
          0     0     0     0     0     0     0     0     0     1      1

Total     6     4     5     5     6     4     3     5     3     6     47