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For the Inventor, By the Inventor

Webster, MA, United States of America

Joseph Z Zdrok

This inventor holds 8 USPTO granted patents. Top assignees: American Optical Corporation, Cabot Safety Corporation. Active years: 1983-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Joseph Z Zdrok. Retrieved from https://idiyas.com/inventor/joseph-z-zdrok

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 1.7

ph-index = 7

Forward Citations = 320(Granted Patents)


Company Filing History:

goldMedal4 out of 409 
 
American Optical Corporation
 patents
silverMedal3 out of 27 
 
Cabot Safety Corporation
 patents
where one patent can have more than one assignee

Years Active: 1983-1994

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8 patents (USPTO):Explore Patents
1. 5373869 - Test probe for face piece respirators (1994-12-20),
2. 5299448 - Positive pressure test apparatus for facepiece respirator (1994-04-05),
3. D340316 - Test probe for facepiece respirators (1993-10-12),
4. D287649 - Disposable respirator (1987-01-06),
5. D286213 - Dual filter respirator (1986-10-14),
6. 4600002 - Disposable respirator (1986-07-15),
7. 4592350 - Respirator (1986-06-03),
8. D270957 - Respirator (1983-10-11),

Title: Joseph Z Zdrok: Innovator in Respiratory Technology

Introduction

Joseph Z Zdrok is a notable inventor based in Webster, MA (US), recognized for his contributions to respiratory technology. He holds a total of 8 patents, showcasing his innovative spirit and dedication to improving safety in respiratory equipment.

Latest Patents

Among his latest inventions is a "Test probe for face piece respirators." This device is designed for fit testing facepiece respirators, ensuring that they provide a proper seal for the user. The probe can be installed in the front or side port of the respirator after removing the filter element or valve. Another significant patent is the "Positive pressure test apparatus for facepiece respirator." This apparatus is engineered to test the fit of respirators with an exhalation valve, featuring a plunger mechanism that seals the valve during testing.

Career Highlights

Joseph has worked with reputable companies such as American Optical Corporation and Cabot Safety Corporation. His experience in these organizations has contributed to his expertise in developing innovative solutions for respiratory safety.

Collaborations

Throughout his career, Joseph has collaborated with professionals like Richard D Maryyanek and Keith Simpson, further enhancing his work in the field of respiratory technology.

Conclusion

Joseph Z Zdrok's contributions to respiratory technology through his patents and collaborations highlight his commitment to innovation and safety. His work continues to impact the industry positively.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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