Patented under the following numbers: 5,676,243 4,976,124- 4,658,479- 4,612,685- D302,280. with others pending ©1985-2020 C.E. Sanders Calslock™ mfg. Thumbsquare™ Pierson, FL - Keaau, Hawaii - Corcoran, CA
Calslock Portable Door Lock since 1985 Redesigned 2011 -2014 - 2020 |
Small children - Dementia or Alzheimer