South Dakota
| Northport Engineering, Inc. | 1355 Mendota Heights Road Suite 130, Mendota Heights, MN 55120 TEL: +1 651 457 8000 FAX: +1 651 457 5603
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| PPS(Sumitomo) | 1118 Colonial Lane San Jose, CA 95132 TEL: +1 408 923 2275
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| VitalSine | 900 WINDMILL ROAD UNIT #303 DARTMOUTH, NS B3B 1P7 TEL: +1 902 835-0497 URL: https://www.vitalsine.ca
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| IPA | 1047 VIA MIRALESTE Chula Vista, CA 91910 TEL: +1 858 271 5996 URL: http://intlpa.com
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