IFI

Patent Intelligence & Technology Report

Class Distribution for 1990-1999 

261 - GAS AND LIQUID CONTACT APPARATUS (IPC B01F, F02M)

       1999  1998  1997  1996  1995  1994  1993  1992  1991  1990  Total

BOC GROUP INC THE
          0     0     2     2     0     1     0     1     0     1      7
IMPERIAL CHEMICAL INDUSTRIES LTD GB
          0     0     0     0     0     0     1     0     2     0      3
ATLANTIC RICHFIELD CO
          0     0     1     0     0     0     1     0     0     0      2
JOHNSON, S C & SON INC
          0     0     0     1     0     0     0     0     0     0      1
SANDEN CORP JP
          0     1     0     0     0     0     0     0     0     0      1

Total     0     1     3     3     0     1     2     1     2     1     14