BBN CORP of CAMBRIDGE, MA filed a PREM14C with the SEC on 1997-06-20. Industry: Services-Computer Integrated Systems Design.
| Filed | Form |
|---|---|
| 1997-07-25 | DEFM14C |
| 1997-06-20 | PREM14C |
| 1997-06-10 | SC 14D1/A |
| 1997-06-05 | SC 14D1/A |
| 1997-05-12 | SC 14D9 |
| 1997-05-12 | SC 14D1 |
| 1996-10-04 | DEF 14A |
| 1995-10-17 | DEF 14A |
| 1995-09-14 | PRE 14A |
| 1994-09-29 | DEF 14A |