id these weird ics?

From: Joe <rigdonj_at_cfl.rr.com>
Date: Fri May 3 17:06:42 2002

  Today I picked up a wire wrap card with some strange ICs. They're 16 pin dips with white ceramic bodies and gold lids and legs. They have the numbers 7552-1C and 7350 on them. I believe the 7350 is a date code. There are other ICs on the card and they're all date coded to 1973. There's also a note on the board that says that it was modified on 7/25/74.

  There's also a trademark symbol on the ICs that looks like a black box with a lower case "i" showing through in gold. I don't think I've ever seen this trademark before, does anyone know what company it's for? Anyone know what the ICs might be?

   Joe
Received on Fri May 03 2002 - 17:06:42 BST