1 united states securities and exchange commission washington dc 20549 form 10 q mark one quarterly report pursuant to section 13 or 15 d of the act 1934 for period ended september 30 2001 transition from file number 0 20047 corporate office properties trust exact name registrant as specified in its charter maryland 23 2947217 state other jurisdiction irs employer incorporation organization identification no 8815 centre park drive suite 400 columbia md 21045 address principal executive offices zip code s telephone including area 410 730 9092 ________________________________________ indicate by check whether has filed all reports required be during preceding 12 months such shorter that was 2 been subject filing requirements past 90 days yes on november 8 20 779 981 shares company common
