Dakota Wesleyan's 'resident fix-it guy' designs school shooting safety device
Custodian looks to patent door-locking design
Source: mitchellrepublic.com
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Custodian looks to patent door-locking design
Custodian looks to patent door-locking design
Custodian looks to patent door-locking design
Custodian looks to patent door-locking design
Custodian looks to patent door-locking design