United States Patent and Trademark Office OG Notices: 12 March 2002

                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of December 11, 2001
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        5,249,714


                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of December 18, 2001
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        5,252,490 
        5,675,855 
        5,676,132 

                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of December 25, 2001
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        5,253,656 
        5,254,331 
        5,254,857
        5,254,929
        5,678,351
        5,678,367
        5,678,541
        5,678,610
        5,678,728
        5,678,796
        5,678,939
        5,678,993
        5,679,105
        5,680,219


                                    Errata

   In the Notice of Expiration of Patents Due to Failure
to Pay Maintenance Fee appearing in the Official Gazette of January 1,
2002 the following patents were inaccurately listed as having expired
when, in fact, they did not expire. They are: 

        5,255,439 
        5,256,849
        5,680,739
        5,680,875
        5,680,960
        5,681,427
        5,682,074
        5,682,302


                                    Errata

   In the Notice of Expiration of Patents Due to Failure
to Pay Maintenance Fee appearing in the Official Gazette of January 8,
2002 the following patents were inaccurately listed as having expired
when, in fact, they did not expire. They are: 

        4,879,045 
        4,879,186 
        5,257,462 
        5,257,468
        5,257,724
        5,257,848
        5,257,912
        5,258,893
        5,258,922 
        5,682,648 
        5,682,688 
        5,682,782 
        5,682,852 
        5,683,313 
        5,683,404 
        5,683,583 
        5,683,707 
        5,684,296 
        5,684,611 
        5,684,684 
        5,684,825 
        5,684,834 

                                    Errata

   In the Notice of Expiration of Patents Due to Failure
to Pay Maintenance Fee appearing in the Official Gazette of January 15,
2002 the following patents were inaccurately listed as having expired
when, in fact, they did not expire. They are: 

        4,880,126 
        4,880,168
        4,881,158
        4,881,236
        5,259,069
        5,259,203
        5,259,266
        5,259,529
        5,259,809
        5,259,954
        5,259,982
        5,685,020
        5,685,057
        5,685,239
        5,685,287
        5,685,594
        5,685,616
        5,685,621
        5,685,864
        5,685,982
        5,686,681
        5,686,797



                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of January 22, 2002
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are: 

        4,881,667
        4,881,844
        4,882,194
        5,261,287
        5,261,410
        5,261,670
        5,261,687
        5,262,329
        5,687,459
        5,687,491
        5,687,839
        5,687,880
        5,688,085
        5,688,604
        5,689,561



                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of January 29, 2002
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are: 

        4,882,822
        4,883,460
        4,883,679
        4,883,999
        5,264,342
        5,264,351
        5,265,033
        5,689,831
        5,689,832
        5,690,113
        5,690,128
        5,690,900
        5,691,328
        5,691,437
        5,691,492
        5,691,516
        5,691,576
        5,691,716
        5,692,037


                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of February 5, 2002
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        5,265,385 
        5,265,584
        5,265,641
        5,265,742
        5,692,458
        5,692,688
        5,692,850
        5,693,002
        5,693,007
        5,693,714
        5,694,323
        5,694,488


                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of February 12, 2002
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        4,886,150 
        4,886,258
        4,886,287
        5,267,856
        5,267,948
        5,695,641
        5,695,906
        5,695,946
        5,696,613


                                    Errata

   In the Notice of Expiration of Patents Due to Failure to Pay
Maintenance Fee appearing in the Official Gazette of February 19, 2002
the following patents were inaccurately listed as having expired when,
in fact, they did not expire. They are:

        4,887,516 
        4,888,113
        5,269,251
        5,269,443
        5,269,900
        5,270,070
        5,697,179
        5,697,218
        5,697,497
        5,697,556
        5,698,809
        5,699,204