David L. Stevenson

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Angola, IN, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic security seal
- Patent number 6,265,973
- Issue date Jul 24, 2001
- TransGuard Industries, Inc.
- Terrence N. Brammall
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Bolt seal lock device
- Patent number 6,036,240
- Issue date Mar 14, 2000
- Tranguard Industries, Inc.
- Craig Hamilton
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Protection device for bolt seal and hasp
- Patent number 5,878,604
- Issue date Mar 9, 1999
- Transguard Industries
- Robert E. Stone
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Bolt seal assembly and tool therefor
- Patent number 5,749,610
- Issue date May 12, 1998
- TransGuard Industries, Inc.
- Terrence N. Brammall
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Lock and tool therefor
- Patent number 5,732,989
- Issue date Mar 31, 1998
- Transgaurd Industries, Inc.
- David L. Stevenson
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Seal
- Patent number 5,450,657
- Issue date Sep 19, 1995
- E. J. Brooks Company
- George Georgopoulos
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Locking seal
- Patent number 4,802,700
- Issue date Feb 7, 1989
- Trans-Guard Industries, Inc.
- David L. Stevenson
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS