Dear Gary,
 Thanks for your notes. My lower limit for GEO is 23 hours (1380 min),
1 hour off from the central value.

24737 and 24740 agreed but desig of 24740 (DSP 18 IUS SRM-2): think this is 08D not 08B.
24282: period is 1353 min, below GEO
20965: thanks, have added this but name is R/B(unknown) not R/B(IUS) (unless
        you know different; I believe press accounts of an IUS on this
        mission, including my own earlier writings, are incorrect; we now
       think this is an SDS B mission built by Hughes and somewhat similar
       to the Leasat satellites)
15545: Believed to be in transfer orbit, with an integral payload
       apogee motor making the final burn (unless you know different);
      similarly 1989-90D. This is according to mission profile descriptions
      leaked in Av Week, which could be in error.
11261: Yes, I'll give you this one marginally, at least for a while
      it was estimated at 1380 min on my borderline.
04630 and 04632 (DSP F1 objects) I consider as below GEO.
01318 is I think in a 680 min transfer orbit - why do you consider it as in GEO?

 Thanks again for the input - Jonathan.