Wierd characters in a file.

am looking for help in removing the weird characters
which are coming along with special characters in the source file .

The user enters text for a description field manually
the description may consist special characters like registered mark( R) , trademark ( TM)
and even some times for regular pipe symbol( | )

the characters are coming good, but a non printable weird character is coming along with
these special characters.
Please verify the image in attachment
you can see a wierd character looks like 'A' between Staples and Registerd mark
and also the character like 'A' between Post-it and Registerd marks

I want to remove such kind of wierd characters only, before processing my source file

I appreciate your help to remove these wierd characters preferably in unix

unix environment: IBM AIX

Thanks