|
Form
|
|
(Filer)
|
Received
(
Period
)
|
| DEF 14A |
 |
ION GEOPHYSICAL CORP |
04/16/13 (05/22/13) |
| DEF 14A |
|
ION GEOPHYSICAL CORP |
04/20/12 (05/23/12) |
| DEF 14A |
|
ION GEOPHYSICAL CORP |
04/21/11 (05/27/11) |
| DEF 14A |
|
ION GEOPHYSICAL CORP |
04/21/10 (05/26/10) |
| DEF 14A |
|
ION GEOPHYSICAL CORP |
04/23/09 (05/27/09) |
| DEF 14A |
|
ION GEOPHYSICAL CORP |
04/21/08 (05/27/08) |
| DEF 14A |
|
ION GEOPHYSICAL CORP (INPUT OUTPUT INC) |
04/10/07 (05/21/07) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
04/12/06 (05/17/06) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
04/01/05 (05/04/05) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
05/13/04 (06/22/04) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
04/30/03 (06/11/03) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
04/17/02 (05/21/02) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
08/23/00 (09/25/00) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
08/24/99 (09/27/99) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
08/27/98 (09/28/98) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
09/02/97 (09/29/97) |
| DEF 14A |
|
ION GEOPHYSICAL CORP(INPUT OUTPUT INC) |
09/06/96 (10/10/96) |