I Have been retired for 20 years, and have been keeping myself busy inventing, building, and selling mechanical items on ebay. I normally receive packages worth $1200 twice a month and was always worried about getting one of them stolen. I kept thinking about ways to prevent this, and searched the market place for a purchasable item, but could not find one that did not need a key, or a conbination, or key code, or a built in scanner that required power and an internet connection for the delivery guys to use it.
I Tinkered for about the last year plus to find a solution that did not require keys, combinations, padlocks, or codes or scans, and I finally came up with the “Package Safe” design as it stands now. I applied for a patent which should be issued this year in march.